I am going to drywall a ceiling. The joists are 2 X4’s, spaced 16″ o.c. The span is 7′ 9″. The length of the room (perpendicular to the joists) is 20 feet. Is 7′ 9″ too great a span for 2 X 4’s to use 5/8 drywall? Is it a better idea to use 1/2″ drywall? Second question — is drywall adhesive a different animal than regular construction adhesive? Any advice will be greatly appreciated!
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2 x 4 joists are very small. Are they supporting a roof or floor above? Or just the drywall?
2x4 joist as you state it, sound like the bottom chords of trusses. Never seen 2x4 joist on loose/stick framing. Usually 2x6 or larger on new construction. My guess is that if it is trusses the 5/8' rock should be OK.
Don't know about glue.
There is an attic space above.... not enough to stand up in, though. There is the potential to store things up there but it isn't being used.
Thank you for this information. Much appreciated.
I wouldn't hesitate to use 5/8" sheetrock in your application. 5/8" is always a better job.
why is 5/8 SR a better material---just curious--WW 57
I'm courious about that to.
16" canters and less than the allowable span for the joist means 1/2" board to me. Save the 5/8" foe 2' oc. Not trussed sono issues with uplift.
5/8" is more rigid and gives
5/8" is more rigid and gives a flatter surface, which is what you want. It'll line those 2x4's right up. That's why it's always a better job.
I'd use 1/2" drywall, but I
I'd use 1/2" drywall, but I would not hesitate to use 5/8" either. At 16" on center the 5/8" would not be required.