Final answer:
The type W drywall screws must be long enough to penetrate the wood framing to a certain depth, typically about 1/2 inch longer than the combined thickness of the drywall and any other material.
Step-by-step explanation:
The type W drywall screws must be long enough to penetrate the wood framing to a certain depth.
The depth will depend on the thickness of the drywall and any additional material between the drywall and the wood framing.
Generally, the length of the screw should be about 1/2 inch longer than the combined thickness of the drywall and any other material.
For example, if the drywall is 1/2 inch thick and there is no other material between the drywall and the wood framing, then the length of the screw should be approximately 1 inch.
If there is an additional 1/2 inch thick layer of insulation, then the screw should be approximately 1 1/2 inches long.