What is the minimum length of screw fasteners required for Gypsum Board?

The minimum length of screw fasteners required for gypsum board is 1 1/4 inch. This length is essential to ensure that the screws penetrate adequately into the underlying framing or structural elements, providing the strength needed for a secure installation. Using screws that are too short may lead to inadequate hold and potential detachment of the gypsum board, compromising the integrity of the wall assembly and potentially leading to issues such as cracking or sagging.

The choice of 1 1/4 inch is also in alignment with building codes and manufacturer recommendations, which specify that screws need to penetrate sufficiently through the gypsum board and into the framing. Other lengths mentioned, while they may be used in different contexts or applications, do not meet the standard requirements for fastening gypsum board to ensure safety and durability in a residential building.