That IMO a lot like furring a basement wall with 2x2's. No nails or screws are likely to ever be an issue from "the back side" and can be disregarded.To clarify, this was a theoretical when I asked about drywall on either side. I said that because I didn't want to take the time to explain the actual scenario. Here goes:
I have a situation where the builder has attached plywood to the underside of roof trusses in order to create a ceiling with a tight air barrier. He will then fur down with 2x2's to attach his drywall lid. He wants to use the small space in between as a chase for wires. 2x2 is ideal because he has standard double top plate so doesn't want to drop too far.
It's a tight attic above, so I suppose you could say the wires are safe on the side of things anyway?
this is where this question originated. Thanks for the replies
Larry said, "Laminating a ceiling with a new drywall layer, such as when covering a textured one, often requires much longer screws"Yes longer screws needed, not so much because you need deeper penetration in the framing member though, you need to penetrate the first layer of drywall before reaching the framing member.
Here is my interpretation:Larry said, "Laminating a ceiling with a new drywall layer, such as when covering a textured one, often requires much longer screws"
K-wired said "Yes longer screws needed, not so much because you need deeper penetration in the framing member though, you need to penetrate the first layer of drywall before reaching the framing member".
Jap says ...... aren't you both simply describing the same thing?,,,, a longer screw?
Correct. Adding an additional 1/2" layer should really only need screws 1/2" longer that what was used in the first layer. Penetration into framing member would still be the same.Here is my interpretation:
Larry is concerned that the rocker will grab any screw as long as it’s way longer - the longer the better. Possibly hitting wire that is properly installed >= 1-1/2” from the surface of the framing.
Kwired is saying the while a longer screw is warranted, a proper screw should be chosen that does not penetrate the framing member deeper than the screws used with a single layer of rock.
What is needed vs what actually happens doesn't always happen.Good luck with that.