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Old 04-04-2013, 08:01 PM   #1
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Plywood question for outdoor application


I'm going to attempt to install a tongue and groove flooring on the ceiling of my covered structure over my patio. Can someone tell me which type of plywood would work best for this? The wood would not be exposed to rain or sun, but I do live in NE Ohio and we get a vaired range of temperatures and humidity. Anyone have any reccomendations? Thanks!


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Old 04-04-2013, 08:48 PM   #2
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if your not looking for a smooth finish either use fir plywood or sheathing grade


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Old 04-05-2013, 07:00 AM   #3
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I'm not sure I understand the question. are you wanting to put sheathing up to the ceiling and then go over that with T&G? if so then standard OSB should be good behind the T&G.
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Old 04-05-2013, 08:30 AM   #4
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All plywood today is made with exterior glue. I would use 23/32 (5) ply minimum fir plywood for good nail retention. OSB is a pain to nail into. I would install the T&G with my pneumatic stapler with 1/4 inch x 1.5 inch resin coated staples, about 1 ft. on center. As far as grade goes, you can use CD Exposure 1 with the C side down. BC would be better with the B side down.
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Last edited by jagans; 04-05-2013 at 08:32 AM.
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Old 04-05-2013, 07:55 PM   #5
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Why not use tongue and groove 1 x 6 pine and forget the plywood. Nail it right to the ceiling joists with a 15 ga. finish nailer and 2" nails.
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Old 04-06-2013, 07:22 AM   #6
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^ that brings back memories of the mountain job and running that 1x6 T&G on the ceilings all day. that is a loud echoing job!get the wood bender!!


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outdoor flooring , plywood

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