I rip off portions of drywall in a 30 year old house, big rectangular hole that is, and replace it with the same type of drywall. Both existing and new is 1/2" thick. The problem is the new drywall after installation is about
1/8" thicker. I have four of those 2' x 3' patches and in all cases the new drywall is always about 1/8" thicker after installation. Is this normal or am I doing something wrong? I'm pretty sure I've purchased 1/2" and not 5/8" drywall but I check it tomorrow. Not too much of a problem as I could make it match. Just more mud and work..