Cut in box for 2 layers of drywall

[James L]

The allied PC244OW has wings that go to 1.5 inches. Still only rated for wall fixtures though.

Maybe I'll use it in a ceiling next to a j-box hidden behind the drywall

 

[kwired]

Remodelers put stuff together just like roofers all the time. Instead of tearing all the layers off, they just keep adding layers on top of what's already there

I recently wired a kitchen remodel. It was a small kitchen and small dining room with a wall separating the two, and it became one big kitchen. When they took out the wall between, they realized the two ceilings were not on the same plane. Someone had overlaid the dining room ceiling with another layer of sheetrock. Both rooms had the most awful-looking texture.

What was the remedy? Do you think they took any of that drywall off? Nope. They added a layer on the kitchen ceiling to match the second layer in the dining room, then they added a third layer on the entire ceiling to make it all smooth

And it all passed inspection.

I can tell you, it was not easy to attach cut in cans.

I had one large pendant over the island. I laid a 2X6 flat on the back side of the drywall with an octagon box cut through the sheetrock

with a ceiling or a roof you can only add so much before weight can become an issue. Won't be same weight for every roof or ceiling.

 

[James L]

with a ceiling or a roof you can only add so much before weight can become an issue. Won't be same weight for every roof or ceiling.

That's a point I brought up. Good night, you are limited on how many roofing layers because of weight. Does nobody think about drywall weight?

 

[kwired]

That's a point I brought up. Good night, you are limited on how many roofing layers because of weight. Does nobody think about drywall weight?

Shorter spans you probably can get away with a lot, like a ceiling where framing span is maybe12 feet or less. Long span a second layer of drywall may be more weight than framing was designed for.

 

[LarryFine]

From what I've heard, one additional layer is allowed. They must be stripped for a third application.