Would this be a code violation

N

nizak

Senior Member
I have a bath remodel that I’m working on and I need to mount a vanity light in an already finished wall.

This particular fixture will not allow for the use of a flanged rework type box.

Would it be permissible to fix a backer board with construction adhesive to the 1/2 drywall on the inside of the wall( backside of drywall in bedroom) and attach a 4” metal octagon box to it?

I could get a 1”x4” piece about 8” long thru the hole.

Adjustable rework fan box won’t work since there’s a pvc vent pipe in the way before I get to the next stud.

Thanks
 
Adhesive can be used to attach your support to the existing wall. We have even set boxes in marble backsplashes using silicone.
 
I’m all for one to get it done and make it easy for us, but am I understanding it’s gonna go to the paper backing of the sheet rock and that’s what supporting your box may not fall vertically, but if someone pulls out, it’s gonna rip right off
 
AC\DC said:
I’m all for one to get it done and make it easy for us, but am I understanding it’s gonna go to the paper backing of the sheet rock and that’s what supporting your box may not fall vertically, but if someone pulls out, it’s gonna rip right off
Click to expand...
The OP said that the box is attached to a "backer board" that is in the wall and that is larger than the hole. The box cannot be pulled out if it's properly fastened to the backer board.
 
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