{"id":3290,"date":"2024-11-14T15:54:03","date_gmt":"2024-11-14T15:54:03","guid":{"rendered":"https:\/\/ikoknowledgecenter.com\/docs\/uncategorized\/is-a-pe-vapour-barrier-sufficient-in-a-flat-roof-build-up-on-a-cementitious-substrate\/"},"modified":"2025-06-23T13:19:49","modified_gmt":"2025-06-23T13:19:49","password":"","slug":"is-a-pe-vapour-barrier-sufficient-in-a-flat-roof-build-up-on-a-cementitious-substrate","status":"publish","type":"docs","link":"https:\/\/ikoknowledgecenter.com\/en\/docs\/flat-roof-systems\/is-a-pe-vapour-barrier-sufficient-in-a-flat-roof-build-up-on-a-cementitious-substrate\/","title":{"rendered":"Is a PE vapour barrier sufficient in a flat roof build-up on a cementitious substrate?"},"content":{"rendered":"\n<p>The use of a PE vapour barrier on a cementitious substrate is generally not recommended. Cement-based surfaces are porous and often still contain construction moisture at the start of roofing works. In many cases, a PE vapour barrier does not provide sufficient protection against exposure to high moisture levels within the roof build-up.<br\/><br\/>Only bituminous vapour barriers offer adequate resistance to construction moisture and ensure the long-term durability of the roofing system in such conditions.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The use of a PE vapour barrier on a cementitious substrate is generally not recommended. Cement-based surfaces are porous and often still contain construction moisture at the start of roofing works. In many cases, a PE vapour barrier does not provide sufficient protection against exposure to high moisture levels within the roof build-up. Only bituminous [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[63],"glossaries":[],"doc_tag":[952,307,897],"class_list":["post-3290","docs","type-docs","status-publish","hentry","doc_category-flat-roof-systems","doc_tag-foundation-en","doc_tag-roofing-en","doc_tag-vapor-barrier"],"year_month":"2026-05","word_count":75,"total_views":"205","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"Luna Degraeve","author_nicename":"luna","author_url":"https:\/\/ikoknowledgecenter.com\/en\/author\/luna\/"},"doc_category_info":[{"term_name":"Flat roof systems","term_url":"https:\/\/ikoknowledgecenter.com\/en\/docs-category\/flat-roof-systems\/"}],"doc_tag_info":[{"term_name":"foundation","term_url":"https:\/\/ikoknowledgecenter.com\/en\/docs-tag\/foundation-en\/"},{"term_name":"roofing","term_url":"https:\/\/ikoknowledgecenter.com\/en\/docs-tag\/roofing-en\/"},{"term_name":"vapor barrier","term_url":"https:\/\/ikoknowledgecenter.com\/en\/docs-tag\/vapor-barrier\/"}],"knowledge_base_info":[],"knowledge_base_slug":[],"_links":{"self":[{"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/docs\/3290","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/comments?post=3290"}],"version-history":[{"count":1,"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/docs\/3290\/revisions"}],"predecessor-version":[{"id":3291,"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/docs\/3290\/revisions\/3291"}],"wp:attachment":[{"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/media?parent=3290"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/doc_category?post=3290"},{"taxonomy":"glossaries","embeddable":true,"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/glossaries?post=3290"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/ikoknowledgecenter.com\/en\/wp-json\/wp\/v2\/doc_tag?post=3290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}