{"id":4750,"date":"2025-09-10T13:31:41","date_gmt":"2025-09-10T11:31:41","guid":{"rendered":"https:\/\/products.selit.com\/guide-to-underlays\/knowledge-abc\/"},"modified":"2026-01-09T10:41:56","modified_gmt":"2026-01-09T09:41:56","slug":"knowledge-abc","status":"publish","type":"page","link":"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/","title":{"rendered":"Knowledge ABC"},"content":{"rendered":"<p>[vc_row type=&rdquo;in_container&rdquo; full_screen_row_position=&rdquo;middle&rdquo; column_margin=&rdquo;default&rdquo; column_direction=&rdquo;default&rdquo; column_direction_tablet=&rdquo;default&rdquo; column_direction_phone=&rdquo;default&rdquo; scene_position=&rdquo;center&rdquo; text_color=&rdquo;dark&rdquo; text_align=&rdquo;left&rdquo; row_border_radius=&rdquo;none&rdquo; row_border_radius_applies=&rdquo;bg&rdquo; overflow=&rdquo;visible&rdquo; overlay_strength=&rdquo;0.3&Prime; gradient_direction=&rdquo;left_to_right&rdquo; shape_divider_position=&rdquo;bottom&rdquo; 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border_type=&rdquo;simple&rdquo; column_border_width=&rdquo;none&rdquo; column_border_style=&rdquo;<a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Solids are substances that are in a solid state at a temperature of 20 &deg;C.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;); 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gradient_direction=&rdquo;left_to_right&rdquo; overlay_strength=&rdquo;0.3&Prime; width=&rdquo;1\/2&Prime; tablet_width_inherit=&rdquo;default&rdquo; animation_type=&rdquo;default&rdquo; bg_image_animation=&rdquo;none&rdquo; border_type=&rdquo;simple&rdquo; column_border_width=&rdquo;none&rdquo; column_border_style=&rdquo;<a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Solids are substances that are in a solid state at a temperature of 20 &deg;C.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px; 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&amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"  href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/solid\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>solid<\/a>&rdquo;][image_with_animation image_url=&rdquo;3131&Prime; image_size=&rdquo;full&rdquo; animation_type=&rdquo;entrance&rdquo; animation=&rdquo;None&rdquo; animation_movement_type=&rdquo;transform_y&rdquo; hover_animation=&rdquo;none&rdquo; alignment=&rdquo;&rdquo; border_radius=&rdquo;none&rdquo; box_shadow=&rdquo;none&rdquo; image_loading=&rdquo;default&rdquo; max_width=&rdquo;100%&rdquo; max_width_mobile=&rdquo;default&rdquo;][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row type=&rdquo;in_container&rdquo; full_screen_row_position=&rdquo;middle&rdquo; column_margin=&rdquo;default&rdquo; column_direction=&rdquo;default&rdquo; column_direction_tablet=&rdquo;default&rdquo; column_direction_phone=&rdquo;default&rdquo; scene_position=&rdquo;center&rdquo; text_color=&rdquo;dark&rdquo; text_align=&rdquo;left&rdquo; row_border_radius=&rdquo;none&rdquo; row_border_radius_applies=&rdquo;bg&rdquo; overflow=&rdquo;visible&rdquo; overlay_strength=&rdquo;0.3&Prime; gradient_direction=&rdquo;left_to_right&rdquo; shape_divider_position=&rdquo;bottom&rdquo; bg_image_animation=&rdquo;none&rdquo;][vc_column column_padding=&rdquo;no-extra-padding&rdquo; column_padding_tablet=&rdquo;inherit&rdquo; column_padding_phone=&rdquo;inherit&rdquo; column_padding_position=&rdquo;all&rdquo; column_element_direction_desktop=&rdquo;default&rdquo; column_element_spacing=&rdquo;default&rdquo; desktop_text_alignment=&rdquo;default&rdquo; tablet_text_alignment=&rdquo;default&rdquo; phone_text_alignment=&rdquo;default&rdquo; background_color_opacity=&rdquo;1&Prime; background_hover_color_opacity=&rdquo;1&Prime; column_backdrop_filter=&rdquo;none&rdquo; column_shadow=&rdquo;none&rdquo; column_border_radius=&rdquo;none&rdquo; column_link_target=&rdquo;_self&rdquo; column_position=&rdquo;default&rdquo; gradient_direction=&rdquo;left_to_right&rdquo; overlay_strength=&rdquo;0.3&Prime; width=&rdquo;1\/1&Prime; tablet_width_inherit=&rdquo;default&rdquo; animation_type=&rdquo;default&rdquo; bg_image_animation=&rdquo;none&rdquo; border_type=&rdquo;simple&rdquo; column_border_width=&rdquo;none&rdquo; column_border_style=&rdquo;<a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Solids are substances that are in a solid state at a temperature of 20 &deg;C.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"  href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/solid\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>solid<\/a>&rdquo;][vc_column_text css=&rdquo;&rdquo; text_direction=&rdquo;default&rdquo;]\n<h3>Knowledge ABC<\/h3>\n[\/vc_column_text][vc_column_text]<div class=\"cm-glossary\"><div class=\"glossary-container \"><input type=\"hidden\" class=\"cmtt-attribute-field\" name=\"glossary_index_style\" value=\"classic\"><div id=\"glossaryList-nav\" class=\"listNav \" role=\"tablist\"><\/div><ul class=\"glossaryList\" role=\"tablist\" id=\"glossaryList\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTermSet\"><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/cc-value\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;The CC value indicates the ability of an underlay to withstand continuous loads. The higher the value, the heavier the furniture you can place on the floor.&amp;lt;br\/&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">CC value<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/cs-value\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;The CS value describes the pressure stability of an underlay. A high CS value means that the substrate does not yield or deform excessively, even under heavy loads. This prevents gaps from forming or breaking and increases the service life of the click connections on laminate floorboards.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">CS value<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/dl-value\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;In addition to static loads, flooring systems are exposed to dynamic loads, for example from walking or moving chairs. The DL value tells you how long an underlay will withstand these loads.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">DL value<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/equilibrium-moisture\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Equilibrium moisture is the residual moisture that a material attains in a constant climate over time. In this state, concrete\/screed no longer releases moisture to the environment. Equilibrium moisture is a key requirement for starting the installation of the final flooring (installation readiness).&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Equilibrium Moisture<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/folding-plate\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;SELIT underlayment is available in the form of folding panels. In each case, a long strip is folded into a handy format. The result is small, easy to transport and simple to install. Folding plates thus combine the advantages of rolls and plates.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">folding plate<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/functional-heating\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;In functional heating, a hot water underfloor heating system is heated up to check that it is working properly. The residual moisture in the heated screed must then be determined. The limit values specified by the manufacturer of the floor covering must be observed. Only when these have been reached, for example by heating the floor covering, can the top floor covering be laid. Functional heating is the responsibility of the heating engineer.    &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">functional heating<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/heating-for-drying\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&lsquo;Heating to dryness&rsquo; refers to the process of heating a hot water underfloor heating system to dry the screed. This is carried out by the floor layer. They then measure the residual moisture in the heated screed. Once the limit value specified by the manufacturer has been reached, the top floor covering can be laid.&amp;lt;br\/&amp;gt;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">heating for drying<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/impact-sound\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Impact sound refers to the sound that is produced when walking on a floor and is perceived in adjacent rooms &ndash; in contrast to footfall sound, which is noticeable in the same room. Underlays from SELIT can significantly reduce impact sound. This has a positive effect on the relationship with the neighbors.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Impact Sound<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/impact-sound-insulation\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Impact sound insulation is often used synonymously with the IS value, which indicates how much an underlay reduces impact sound. Sometimes the word is also used as another term for underlay.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Impact Sound Insulation<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/information-sheet\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;A technical information sheet contains information from experts on a specific topic. It reflects the state of the art, for example with regard to important requirements and criteria for underlays. &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">information sheet<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/is-value\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;The IS value indicates the impact sound reduction of flooring underlays. The higher the value, the less impact sound is heard in adjoining rooms. A high IS value is particularly important in rental apartments to avoid disturbing neighbors.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">IS Value<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/moisture-barrier-film\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;A moisture barrier, also known as a &lsquo;vapour barrier&rsquo;, is an additional layer that protects the top floor and underlay from rising moisture from the subfloor (residual building moisture). It can be laid separately or integrated into the underlay. The sd value of a moisture barrier must be at least 75 m.  &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">moisture barrier film<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/norm\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;A standard is a document that sets out requirements for specific products, processes or services. Standards are developed by recognised organisations and their standards committees. Among the best-known standards are the DIN standards. SELIT is very active in standardisation work.   &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Norm<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/pc-value\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;The higher the PC value, the better the underlay can compensate for small, isolated unevenness in concrete or screed subfloors and ensure a level surface. This is important to avoid voids and prevent damage to the flooring system. &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">PC Value<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/pe-film\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;PE films can be used as vapor barrier films if their sd-value is 75 m or more.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">PE Film<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/residual-moisture\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Residual moisture is the amount of unbound water contained in a screed\/concrete. It can be measured in various ways. Common methods include CM measurement, measurement according to the electrical resistance principle, or gravimetric moisture determination. The floor in question is only ready for covering once the limit specified by the floor covering manufacturer has been reached.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Residual Moisture<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/rlb-value\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;In addition to heavy furniture, walking, or moving chairs, falling objects pose a hazard to the floor. The RLB value describes the ability of underlays to absorb the forces that occur and protect the floor. It is specified as the minimum drop height in cm.  &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">RLB Value<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/r-value\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;A high R-value or R&lambda;-value indicates a high thermal resistance. This contributes to better thermal insulation and warmer feet in unheated laminate floors.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">R-value<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/sd-value\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;The sd value is crucial for moisture protection films. The higher the value, the lower the moisture permeability, and the more effective the film is as a barrier against residual moisture. Please note: For mineral subfloors, moisture protection is mandatory to prevent damage to the floor.  &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Sd Value<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/solid\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Solids are substances that are in a solid state at a temperature of 20 &deg;C.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">solid<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/state-of-the-art\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;The state of the art describes the technical possibilities at a specific point in time, based on established scientific and technological findings.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">State of the Art<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/structure-borne-sound\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Structure-borne sound is sound that propagates through a solid body. It contrasts with airborne sound and plays an important role in buildings. For example, the airborne sound from a loudly playing stereo system is converted into structure-borne sound within a wall. This structure-borne sound is not audible. However, this changes when it is converted back into airborne sound, for instance, when radiating from a wall &ndash; a process responsible for what is known as &amp;quot;impact sound&amp;quot;.    &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Structure-borne Sound<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/technical-specification\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;A technical specification consists of rules and guidelines that are drawn up and published by a recognised organisation and its standards committees. It is a possible precursor to a standard.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Technical Specification<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/underfloor-heating\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Underfloor heating is a type of surface heating used to warm the floor. It can also be used for space heating. Common systems are hot water or electric heating systems. One of the advantages of underfloor heating is that it does not require unsightly radiators and, depending on the system, is very energy efficient. Our range includes many underlays that are suitable for use with underfloor heating.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">underfloor heating<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/underlay\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;As an elastic layer under a floor covering such as laminate, parquet, or LVT, underlays improve the properties of the floor and protect it from damage. This includes protection against loads as well as a reduction in walking and impact sound. Depending on the flooring system, an underlay can also improve thermal insulation and increase walking comfort.&amp;lt;br\/&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">Underlay<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/vapour-barrier\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;A moisture barrier, also known as a &lsquo;vapour barrier&rsquo;, is an additional layer that protects the top floor and underlay from rising moisture from the subfloor (residual building moisture). It can be laid separately or integrated into the underlay. The sd value of a moisture protection film must be at least 75 m.&amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}&amp;lt;\/style&amp;gt; &amp;lt;script&amp;gt;\/\/ Warten bis das DOM geladen istdocument.addEventListener(&amp;quot;DOMContentLoaded&amp;quot;, function() {  \/\/ Das erste -Element mit der Klasse ausw&auml;hlen  const backlink = document.querySelector(&amp;quot;a.cmtt-backlink-bottom&amp;quot;);    if (backlink) {    \/\/ Den sichtbaren Text &auml;ndern    backlink.textContent = &amp;quot;Back to the ABC&amp;quot;;     }});&amp;lt;\/script&amp;gt;&lt;\/div&gt;\"><span itemprop=\"name\">vapour barrier<\/span><\/a><\/li><li class=\"\" itemscope itemtype=\"https:\/\/schema.org\/DefinedTerm\"><a href=\"https:\/\/products.selit.com\/en\/guide-to-underlays\/knowledge-abc\/walking-noise\/\" role=\"term\" class=\"glossaryLink glossary-link-title \" style=\"\" itemprop=\"url\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemBody&gt;&amp;lt;!-- wp:paragraph {&amp;quot;translatedWithWPMLTM&amp;quot;:&amp;quot;1&amp;quot;} --&amp;gt;&amp;amp;#13;Walking noise refers to the sound produced when walking on a floor and heard in the same room. The right underlay can significantly reduce walking noise &ndash; as well as impact noise &ndash; thereby contributing to better room acoustics and greater living comfort. &amp;lt;br\/&amp;gt;&amp;amp;#13;&amp;lt;!-- \/wp:paragraph --&amp;gt;&amp;lt;style&amp;gt;.cmtt-backlink-top, .blog_next_prev_buttons {display:none !important;}.cmtt-backlink-bottom{background: #002962;    background-position-x: 0%;    background-position-y: 0%;    background-repeat: repeat;    background-image: none;    background-size: auto;  width: fit-content;  padding: 3px 10px;    padding-right: 10px;  color: white;  font-size: 16px;  font-family: &amp;#039;MarkProBold&amp;#039;;  background-image: url(&amp;#039;https:\/\/products.selit.com\/wp-content\/uploads\/2025\/09\/SELIT_Pfeil_links_weiss.png&amp;#039;);  background-size: 12%;  background-repeat: no-repeat;  background-position-x: 146px;  padding-right: 42px;  background-position-y: 4px;}.cmtt-backlink-bottom:hover{background: #002962;    background-position-x: 0%; 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