I plan on demo'ing the old plaster ceiling, interior walls, and exterior walls in a few rooms this spring. I'm doing this so I can insulate and run new wiring, etc. Any reason I can't use 3/8" sheetrock instead of 1/2"? I recently handled some 3/8" after doing a whole kitchen in 1/2" and found it considerably lighter. Yeah, I know it's only an 1/8" difference, but it was a lot easier to handle. Since I'll be handling up to 40 sheets of this stuff, I'll take any help I can get.

I'm in the process of remodeling a bedroom. I've got it gutted, rewired, & (mostly) insulated. I want to shim the drywall with plaster lath on the interior walls so that I don't have to remove & rip down the door jams. What should I use to fasten the lath to the studs? Most of the lath still has the old nails in it; can I use them? And, what length of screw should I use to attach the drywall? The lath is roughly 5/16 thick, and I plan to use 1/2" drywall. On the ceiling I plan to run 1x4's perpendicular to the joists to make shimming easier. What length screws should I use to attach the boards to the ceiling, and the drywall to the boards?