Vaopr Barrier Install Details
Question on vapor barrier install: For a crawlspace, one can take 6mil polyethylene and run it up the wall 6-8 inches. My question is the attachment method. Acoustical sealant can work for this but I read on a barrier supplier’s website that a polyethylene should not be used with an acoustical sealant. This is for material called Tenoarm. The link is here if you want to go to it:
or here is the portion I want to focus on:
“We do not recommend the use of construction tapes, caulks, or acoustical sealant in contact with any quality polyethylene since these can cause premature deterioration and are often short-lived.”
Is their statement true that a poly material should not be used with an acoustical sealant? Are all acoustical sealants made similarly? Are they petroleum based? Looks like the USG version is water based. Is it an oil based product that “destroys” poly?
Would there be any need to use more than just the acoustical sealant for attachment to walls? Would there be any reason to use a nylon expansion fastener drilled into block or concrete? Something like this product:
Is this overkill?
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