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-   -   Deck boards on pt plywood? (http://www.diychatroom.com/f14/deck-boards-pt-plywood-105279/)

BigTy 05-22-2011 11:57 PM

Deck boards on pt plywood?
 
For an underdeck shed , advice on sheeting the joist with pt plywood and putting deckboards on the plywood. Trying to make the "shed" as waterproof as possible and its 5' or so , so would prefer to try and keep as much headroom as possible. Any advice is appreciated

chrisBC 05-23-2011 03:12 AM

So this underdeck shed will be subject to rain and water I take it?

if you are putting plywood down on the joists, you should create a slope with sleepers, and then put your plywood down. If you put down deckboards with a proper space between each board, then you do not have to worry about water pooling, like you do with the plywood. Hence the need to create slope.

Ron6519 05-23-2011 09:35 AM

Quote:

Originally Posted by BigTy (Post 652949)
For an underdeck shed , advice on sheeting the joist with pt plywood and putting deckboards on the plywood. Trying to make the "shed" as waterproof as possible and its 5' or so , so would prefer to try and keep as much headroom as possible. Any advice is appreciated

I wouldn't do this. Water would be trapped on top of the plywood. Pressure treated or not, it will rot.
Ron


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