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That job in Denver where we glued down LVP over hydronic radiant heat was a disaster
Was on a big commercial install last winter, building was in Denver, CO. The GC insisted we glue down LVP directly over the hydronic radiant slab. I told him we needed an uncoupling membrane or at least a floating system. He said 'I've done it this way for 10 years'. 4 months later I drove by and saw 4 different sections already buckled up at the seams. The heat cycles expand and contract the planks way more than people realize. Now I refuse any glue-down job over in-floor heat, I don't care who pushes back. Has anyone else had a contractor blame you later for their bad spec?
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the_miles22d ago
Blame the glue, not the system. Those failures probably came from using the wrong adhesive for the heat cycles, not from gluing down over radiant heat to begin with. I've put down thousands of feet of glue-down LVP over hydronic slabs in Colorado without a single callback, but you have to match the glue to the substrate temp range. The GC might have cheaped out on the adhesive or the planks didn't meet the manufacturer's heat rating, that's on you for taking the job without verifying the spec. Saying no to all glue-down over radiant heat is like a mechanic refusing to work on turbo engines because one overheated on him.
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milap3522d ago
Right there with you @the_miles, I've seen the same thing with proper adhesive matching.
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