We plan to install floating cork flooring over cement slab at grade. A moisture barrier like Moisture Block is needed as our real-life experience of moisture migrates from the ground up, through cement. We also want QuietWalk: it's insulative, cushioning & moisture wicking. The cork floor manufacturer's installation pdf says don't install the floor over an underlayment more than 1/8" (0.125) thick. QuietWalk is .13" thick (.05" too thick). Plus .006" thick Moisture Block would exceed max allowable thickness by .056. I saw in another Q&A using both may be overkill, but I feel we need both. I'm confused about exceeding the manufacturer's allowed underlayment thickness. Can you clear up any confusion and can I use both underlayments together?
QuietWalk Plus 100SF Roll
Adhesives and Underlayment
Status:
Open Feb 28, 2022 - 12:11 PM
1answer
Staff Answer
Mar 04, 2022 - 09:14 AM
Quietwalk Plus is a recommended underlayment for Waterproof Cork, as is Moisture Block. Quietwalk does have a moisture barrier and is a vapor retarder, so Moisture Block is not necessary. Please refer to the installation guidelines regarding moisture protection and humidity levels before installing. It's important to measure and keep records of the relative humidity of the subfloor and the ambient air before, during, and after installation.
View More Product Details
QuietWalk Plus 100SF Roll
Zero VOC, floating floor underlayment with built-in sound and vapor barrier and no anti-microbials QuietWalk Plus underlayment improves a floor four ways: provides a patented system of moisture protection reducing mold and mildew smooths out little sub-floor imperfections quiets impact sound and flo...
See More
View all Adhesives and Underlayment Questions & Answers
View all QuietWalk Plus 100SF Roll Questions & Answers
