I tore down the drywall on the wall between my unconditioned garage and conditioned living room. I want to install 1″ rigid foam with 1×3 furring strip and then drywall on top. for the outlets, I know I’m going to need an extension box – but I’m struggling to find a 2.25″ extension box – am I doing the math correctly? 1″ rigid foam, 0.75″ furring strip, 0.5″ drywall. Is there something people use specifically, or do you just keep stacking extension boxes and get a screw that’s long enough?
Thanks in advance.
Replies
use a 4 square box set out from the stud 1/4" with an 1 1/2" extension. That will be flush with the foam. Then use a 5/8" plaster ring. You need 5/8 drywall on the garage side of the wall,
Or mount your boxes on the face of the studs
Thank you!