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Unread 10-06-2019, 07:29 PM   #61
JWOrl
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Join Date: Sep 2019
Location: Orlando, FL
Posts: 117
On the one wall, it needs to be furred out at least 1/2 inch, possibly a tiny bit more, for the board to be in the correct position. And then my boards are .42 inch thick.

The Backer On screws that I have are 1 5/8 inch, which would not allow for at least 3/4 inch of the screw penetrating the stud, with the other added materials in front of the stud...I read that 3/4 inch is the ideal amount.

The next size up is 2 inch Backer On screws. Would these be safe to use? I read on another site that if you have too much penetration beyond 3/4 inch the screws tend to break off, but I don't know if that's really true.
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