Which is the better underlay for Marmoleum Click on a wood subfloor with an unfinished crawl space underneath? I've looked at MP Quietwalk Plus and MP moisture block, but I'm unsure which is better, or if there are other/better options. SAMPLE - Forbo Marmoleum Click Cinch Loc Seal, Cork Tree Waterproof Click - Floating

Question

Status: Open Nov 11, 2022 - 06:26 AM

Answer

Nov 14, 2022 - 11:59 AM

Moisture from crawl spaces can be absorbed into the subfloors and then into the Marmoleum unless they are properly sealed first from underneath the floor joists with 6mil poly. Also the crawl space needs to be ventilated properly. QuietWalk Plus and Moisture Block do not take the place of these requirements. Please carefully read and follow the substrate evaluation guidelines: https://www.greenbuildingsupply.com/core/media/media.nl?id=1105539&c=772072&h=N
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