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Old 05-22-2011, 10:57 PM   #1
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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

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Old 05-23-2011, 02:12 AM   #2
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Deck boards on pt plywood?


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.

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Old 05-23-2011, 08:35 AM   #3
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Deck boards on pt plywood?


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Originally Posted by BigTy View Post
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.
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