Double Decker Deck Help

georgia dawg

My customer wants a covered porch with a open deck stacked above it. The upper deck ledger will only give a max slope for the porch roof of about 2/12. He doesn't want any of those vinyl "rain guard" solutions. He wants a plywood or t&g porch ceiling. Any suggestions?

Foxgguy2001

I dont see why you couldnt rip the deck joist to get the appropriate slope, what size are you using? At the very worse just tell the cutomer you can do whatever he'd like within the code requirements and that he'll have to compromise one way or the other.

Bone Saw

why would you go through all the trouble of ripping joists and reducing def. limit and load rating (which doesn't address the situation) when you could just pitch the deck just use an "over the joist " membrane system for drainage and apply your t/g

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Sider' Brian

FWIW, I agree with Bone Saw on this one.

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Framer33884

I think I see what your saying, a deck on top??? We have done a few in the last 3 months with 1/4" per foot with some rubber crap on top. Alot of help huh? I'll see him tomarro and try to repost.

georgia dawg

We furred perpindicular underneath the joists with various height pieces to generate about a 6" slope over 10'. We then connected some raised seam metal to the furring strips and caulked around the support posts and ledger side. A 6" overlap of the ledger flashing also helps keep the water away. When we attach the wood ceiling and porch sides, we're going to waterproof all sides of the wood before installation, and we're also going to put in some 3" circular vents at each ceiling corner to allow ventilation "just in case".