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Vapor barrier under LVP

2 years ago

I have 2 layers of plywood subfloor on top of the floor joists. There is a crawl space beneath with plastic lining, I installed vapor barrier between the 2 sheets of plywood, do I need Another layer of vapor barrier underneath the LVP if it has backing/padding on the backside?

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Comments (3)

PRO
DeWayne
2 years ago
Why did you install a vapor barrier between the plywood? That's not industry standard for any applicaiton.
Hunter C
Original Author
2 years ago
When I ripped up the damaged subfloor and installed new about 3 months ago, I had to match the existing level or the remaining rooms which required 2 layers and I installed vapor barrier between the 2. If I remember correctly there was paper between the 2 layers when I tore them out
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millworkman
2 years ago
last modified: 2 years ago
And you do not use two moisture barrier's within a flooring system,

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