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Watching a 10-year-old glue-down LVP floor fail in a Florida condo changed my mind on vapor barriers.
The entire perimeter was buckling because they skipped the 6-mil poly over the slab. Now I won't even start a job without checking the moisture reading first. Anyone else run into this on a concrete subfloor?
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tyler_hernandez20d ago
Yeah, that'll do it. Used to think a pad was enough for LVP over concrete. Seeing a floor swell up like that from slab moisture was a real wake-up call. Now the moisture meter comes out before anything else gets unloaded.
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martinez.karen19d ago
Seeing a floor swell up" is exactly the kind of thing that makes you change your whole process. I was totally in that same boat, thinking a good underlayment was the magic fix for everything. Then I helped a friend pull up a brand new LVP floor that was buckling, and the concrete underneath was just dark with damp. It wasn't even a basement. That visual really stuck with me. Now I test every single slab, no shortcuts, because fixing that mess is way worse than taking five minutes with a meter.
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