If you want your floor not to squeak then glue and screw with 2” long screws in most applications, #8 screws are sufficient. Screws should be driven at every joist on 12” centers and on 6” centers along the edges parallel to the joists. If you are counting, that results in the use of 43 screws per 4 x 8 ft sheet when installed with the long edge perpendicular to the joists, and 52 screws per 4 x 8 ft sheet when installed with the long edge parallel to the joists. Hope this helps.JoeCaption,
The rest of the floor is straight 5/8" plywood, so I thought I'd stick with that. I will use construction adhesive (PL Subfloor, unless you have another suggestion). I'm using screws because I don't ever want this floor to squeak again -- may cost a bit more, but ...
At least, that's the plan. I'm open to suggestions, though.
...And under what circumstances would that orientation be appropriate?epson said:and 52 screws per 4 x 8 ft sheet when installed with the long edge parallel to the joists.
I would not use screws on the 1/4". Screws tend to make plywood that thin pucker. The puckers will show through even loose-lay vinyl. It is best to staple the 1/4" and don't use luan. It contains voids in the plys that can collapse.JazMan,
You are correct: there's a second sheet.
Also, I will be adding an additional layer of 3/4" T&G plywood, staggered and offset, in order to raise the floor height to match the existing floor in the adjoining room. I plan on putting 1/4" underlayment on top of the 3/4", and then finish with a loose-lay vinyl sheet.
Question: when I screw down the 3/4" T&G plywood, do I use the same approach as for when is going to tile a floor, i.e., every 4" along the edge and every 6" within the field?