Plywood Ceiling Strapping
graineryarchco
| Posted in General Questions on
Good evening all,
Looking to get some feedback on any potential issues with installing 1/2” x 3” plywood strips at 16” o.c. as strapping on the underside of my roof trusses. I need the strapping (1/2”) for drywall lid install. Any concern w this from the drywall side?
Double stud wall assembly with 1/2” plywood cap that overhangs the inner top plate by a few inches – transitions the air barrier from the exterior to the ceiling plane.
Option 2: could use 1×3 and trying to add 1/4 gasket or seal material to the 1/2” wall cap to make up difference.
Option 3: use full sheets of 1/2 ply or osb for drywall to attach to.
Cheers.
CT
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Replies
This is the way ceilings are customarily done in New England, I believe it's code in Massachusetts. Normal is 1x3 on 16" centers running perpendicular to joists. If you do plywood caps between the top plates of walls and the joists then you can caulk the caps to the top plate and to the drywall and have a nice tight ceiling.
If you've already done 1/2" plywood caps then you have to do 1/2" strapping. If you haven't, one of the nice things about 3/4" is it creates a chase for wiring and even 1/2" pipe. Not as big a deal with trusses as with solid joists but still nice.
Thank you Nick.
Yes, that was my plan. sealing the drywall to the caps on the exterior walls and interior for the nice tight ceiling.
I just wanted to make sure the 1/2" plywood would be strong enough / no issues for drywall install. Not quite as stout as the 3/4" 1x material. At 16" oc I'm hoping its all good. I may opt for full sheets of 1/2" ply or OSB similar to Ben Bogie's method he's written about.