AVS Special Member
Join Date: Dec 2008
Location: L.A. - Lower Alabama
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A few of quick questions for those of you that have used DW and GG on the back of your subfloor.
1) I understand the recommended screw length for 5/8" DW and 3/4" subfloor decking is 1-1/8". This sounds right as it will give 3/8" engagement in the subfloor, but will allow 1/4" extra space to prevent the screw tip from contacting the floor covering above (necessary for carpet, probably for tile, and not a bad idea for hardwoods either).
2) Are standard coarse thread drywall screws recommended?
3) How did you estimate the amount of GG for the pieces that go between the joists? I know it's 2 speedloads for a 4x8 sheet of DW, but once It's cut up, all I know to do would be to lay out my pieces into roughly 4x8 sections and apply the GG.
4) How did you deal with the nails/staples from the flooring above? I've got hardwoods that have lots of staples poking through the subfloor. I initially thought to just hammer them flat, but I'm a little concerned about loosening the staple and flooring above. Should I hammer them flat, or cut them off?
Any other suggestions are appreciated!