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xplorall 03-25-2010 02:28 AM

Redgard and radiant heat flooring
Does anyone know if Redgard has a compatibility issue with heated flooring? I can't find any limitation notes on the web sites but I thought I'd through the question out to some pros. I'm coating Hardi backer prior to putting on the heating mats and tile.

poppameth 03-25-2010 06:58 AM

I don't use RedGard but I know most systems I've seen, especially Schluter Ditra, always recommend you apply the membrane over the heat, not under it. You use self leveling compound or thinset to embed the mat and then apply the membrane to the finished surface prior to tiling.

warmsmeallup 03-25-2010 06:34 PM

Sluter and Redgard both add some insulation value. Though it may be minor, make very sure you have less resistance above the element before installing it.

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