What kind of screw should I use to screw down a plywood subfloor to the joists?
#1
07-23-14, 07:27 PM
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What kind of screw should I use to screw down a plywood subfloor to the joists?
The ply is 3/4". Ive gotten all sorts of recommendations. Someone told me not to use deck screws because the top of the shank is screw. Someone told me it has to be 3". Someone told be 1-3/4". Someone told me #8. Someone told me #10. Etc etc. Thoughts? Thanks!
#3
07-24-14, 04:07 AM
This is the first layer directly on the joists, correct? Any second layer will not be glued and will not be screwed to the joists, but in the field between the joists, using the same 2" decking screws. I recommend torx head screws. Less cam out and drivability.
#4
07-24-14, 05:35 AM
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Torx screws are good, and depending on what you find they may be #9 or #10, so that might explain why you got some different answers.
#5
07-25-14, 02:17 PM
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Okie dokie, so 2" screws? No bigger?
Additionally, are decking screws ok? I was told that since they were not threaded to the top of the shank they're not as good for what I need them for. Or something.
Thanks!
Additionally, are decking screws ok? I was told that since they were not threaded to the top of the shank they're not as good for what I need them for. Or something.
Thanks!
#6
07-25-14, 02:30 PM
By not having thread all the way to the top they will tend to pull the two plies together. Besides, I believe 2" screws are threaded all the way.
#7
07-25-14, 02:51 PM
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None of the 2" decking screws i saw had a fully threaded shank. So you're telling me that a partially threaded shank would be best for my situation? Thanks!
