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Old 03-22-2009, 03:18 PM   #1
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plywood ceiling - screw sizes


I'm about to screw plywood into the 2x6 ceiling joists - It's 3/4 inch plywood, and I have either 1 1/4 inch coarse thread drywall screws, or 2 inch fine thread drywall screws - which should I use, or is neither suitable?

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Old 03-22-2009, 04:07 PM   #2
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plywood ceiling - screw sizes


I also have 2 1/2 inch exterior screws if those are better - any advice?

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Old 03-22-2009, 05:22 PM   #3
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plywood ceiling - screw sizes


I would use the 2-1/2 inch screws.
Why are you putting up a plywood ceiling?
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Old 03-22-2009, 06:20 PM   #4
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plywood ceiling - screw sizes


plywood, then cover in drywall and screw in every 8inches, then redguard and tile - the ceiling over a schluter shower - plywood gives extra support with 20 inch joists
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Old 03-22-2009, 06:42 PM   #5
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plywood ceiling - screw sizes


I agree 2 1/2 inch screws. Can I get a picture of the finish product?
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Old 03-22-2009, 06:48 PM   #6
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the finished shower, or the hung drywall?
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Old 03-22-2009, 06:53 PM   #7
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plywood ceiling - screw sizes


Not sure where these ideas are coming from. But coarse thread.. the length most be the depth of the material plus 1" and not more into the studs. The screws or nails will more if they are driven deeper than 1". So 2" would be better than 2 1/2"
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Old 03-22-2009, 06:54 PM   #8
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plywood ceiling - screw sizes


the finished shower.

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