When fastening a tong and groove plywood subfloor with screws and
glue, I was wondering the spacing for screws, the recommended screw
size and whether nails in addition would be helpful. It is a 10 x20
sunroom addition and we had to pull the subfloor to strengthen a few
joists that felt loose and I want to make sure the contractor has the
new subfloor fastened down adequately.
Also he had to remove the tong and and groove where it is next to the
original floor. Should anything special be done over the small gap?
A floating laminate floor will go on top.