[ParkModel]

I'm building a Park Model.

I'm laying down 1/4" plywood under my joists (to keep out critters etc.), then 3/4 plywood sub-floor.

Do I still need a vapor barrier given the 1/4 plywood?

Thanks.

 

[ront02769]

Plywood is not a vapor barrier

 

[joecaption]

OK what's a park model?
1/4" is useless and is just going to sag and delaminate.
Should have been 3/8 exterier rated.
Vapor barrier needs to be on the ground under it to stop rising moisture.

 

[Mingledtrash]

This site shows several details with trade offs for different applications.

http://web.ornl.gov/sci/buildingsfoundations/handbook/section3-2.shtmlhttp://