So....Does a concrete slab need to be sealed AND have underlayment for a floating floor? I'm a little confused on the moisture barrier requirement. Can we just put the Kahrs mat over a radiant base, or does the slab need to be sealed before radiant install? Sustainable Bamboo Flooring from GBS, Wide Plank Click Engineered Strand Bamboo Flooring Bamboo Flooring

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So....Does a concrete slab need to be sealed AND have underlayment for a floating floor? I'm a little confused on the moisture barrier requirement. Can we just put the Kahrs mat over a radiant base, or does the slab need to be sealed before radiant install? Sustainable Bamboo Flooring from GBS, Wide Plank Click Engineered Strand Bamboo Flooring Bamboo Flooring

Status: Open Aug 02, 2024 - 06:53 AM

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Staff Answer

Aug 07, 2024 - 11:34 AM

Referring to the installation manual, https://www.greenbuildingsupply.com/c..., it talks on page 5 about sealing if it's gypcrete. But it does not say so for regular concrete. Just use the QuietWalk Plus over the concrete and then install the bamboo over that.

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So....Does a concrete slab need to be sealed AND have underlayment for a floating floor? I'm a little confused on the moisture barrier requirement. Can we just put the Kahrs mat over a radiant base, or does the slab need to be sealed before radiant install?

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