To make these blocks, we cut 2x4s to a width of 3-1/8 in to create recessed butt joints on both sides of the wall. In areas where you won’t be hanging drywall on the other side (ceilings and ...

In the room underneath, find and remove the nails or screws holding the drywall to the ceiling within 18 inches of the wall. You’ll gouge some holes, but you can patch them later.