I will be installing a 3/4" maple floor this week over 3/4" plywood, in a home that is 14 years oldand has some minor squeaks in it. It is screwed down now but I wanted to add some more screws, should I put them right beside the old ones or in the middle between them?
I also have one floor joist that is crowned about 3/8" in a low traffic area, I have very limited access to get to it from underneath. An installer where I bought the wood just said to take the crown down with a belt sander and then shim it if necessary.
Any info greatly appreciated!
The answer will depend on your floor. I have had some needing just 1 screw/nail and that took care of a squeek, where as some areas are more squeek prone.
Have fun.. the best way is to fix it in part from under the floor.