Depending on the amount of shielding required they are 1/16 or 1/8 thick. Set the nose of the screw gun to break the face of the paper (yea, I know - I guess the bonded lead is doing most of the carrying) They are already sized to the dimension of the screw head, a dot of caulk and push it in the hole. Tape and bed as per normal. The lead sheet is bigger than the drywall sheet so that it covers/protects the edge joints.
Rico, I guess I was remembering the miseries of working the material and the tediousness of the installation, it did not leave many fond memories. We designed and manufactured a special rack to mount to a fork lift to hoist the sheets to the ceiling. This room was for exray examination of aircraft parts. It was a sizeable room. Gyp for the fire rating and lead for the x=rays. ______________________________ Keep the whole world singing . . . . DanG (remove the sevens) snipped-for-privacy@7cox.net