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Old 03-25-2017, 08:03 PM   #1
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Covering sagging ceiling drywall


The ceilings thru out my house are sagging and I'm planning on redoing them. The plan is to take 1x4's and screw them to the joists over the existing drywall. My question is if I use 16 inch centers can I get a way with using 1/2 drywall or do I still need to use 5/8's. Any help will be greatly appreciated.
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Old 03-25-2017, 08:44 PM   #2
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Re: Covering sagging ceiling drywall


I think the question at issue might be what is causing the sagging... could it be your framing.... and you'll be adding alot of dead laod.

5/8 is nice... it is stronger and spans better especially accross unculled difficult frameing.... but it's heavyier.

You might get away with a good sheetrock crew., bunch of shims, and 3/8.

Depends on what is sagging.

Good luck
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Old 03-25-2017, 09:47 PM   #3
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Re: Covering sagging ceiling drywall


MTN, its the drywall. Original builder used 1/2 rock on 2ft centers. As for the framing it seems pretty solid.
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Old 03-27-2017, 07:23 AM   #4
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Re: Covering sagging ceiling drywall


16" oc is the norm for 1/2" drywall. As long as your joists can take the added weight, you can use 5/8 directly on the 24" span joists - no 1x needed. Check the joist span charts for deadload cap and spans/spacing. Unused attic ceiling joists are set for 10 ft/lb, but check the numbers. I think that is what I read on 24" oc framing houses. I would make stress relief cuts in the middle of drywall sags so that they'd be easier to push up with new drywall. For a whole house, I'd rent or buy drywall lift.
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Old 04-02-2017, 06:54 PM   #5
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Re: Covering sagging ceiling drywall


You should definitely use 5/8" for 24o.c. spacing plus it meets fire code for ceilings. Once you pull down the old rock you can get an idea of what going on and how to plane in the new rock if necessary. I've done it many times but each situation is different.
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