Abstract: A back-blocking device and method designed to attach any thickness of drywall together at the butt ends of the panels. Butt seams are necessary because of larger ceilings and walls where using one length drywall panels is impossible. Using conventional techniques, butt seams are difficult to conceal and are subject to ridging. This device and method enables the joints to be made between the framing members by securing each end to a specially designed back-blocking. This union creates a joint that attaches the panels together, basically creating a continuous piece of drywall. The back-blocking is slightly angled down the center, at an angle of approximately 170 degrees.