(12-06-2011, 08:29 PM)eaadams Wrote: The carpet example is valid for what it was used. Astm is moving towards a standard where the perm rating of anything on top of another thing. I.e. your vapor retarder needs to have lower permeance than the carpet, your mms needs to have a lower permiance than your vapor variety, if you want to use products that breathe use a carpet on top. (the real objective is anti floor covering industry to drive spec writers to polished / stained concrete - but flooring people are too busy fighting for table scraps)
Anyway it is valid. But always remember that moisture movement does NOT mean that it is still not a wonderful environment for mold.
I'm just glad I do residential. I never appreciated spec writers, architects and GC's who don't understand moisture issues.
Quote:JD said, "Consider a porous carpet on a wet slab, everything breathes and the moisture goes right through.
The adhesive would be affected by the alkalinity over time."
I understood what he said but that applies to anything really.
(12-06-2011, 09:10 PM)CC Solutions Wrote: Where in the world did you find those OLD probes???? Those are well past their date for certification....
I found Jason's stash.