Are drywall screws suitable for attaching a 3/4" tongue-and-groove plywood subfloor?
In this case, joists are 16" O.C. and no glue will be used.
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By "drywall screws", I think you are meaning 1 5/8" blued screws. I agree with BMitch that they would not be a good choice. We usually shoot down plywood subflooring with 2 1/2 to 3" ring shank nails, however 2' to 2 1/2" decking screws work well, but just a lot more work. I would encourage you to use a little adhesive on top of the floor joists or strips of felt paper or Grace ice/water shield to avoid any squeaks later on. |
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I wouldn't. Drywall screws should only be used for drywall, and a temporary coat hanger. You want more strength and need less space for the threads to secure the subfloor. The drywall screws have a lot of thread to hold the drywall itself, but have very little shear strength. |
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