What staples for underlay?
You can fasten Sure. Ply® plywood underlayment by selecting one of the following options: Galvanized coated chisel-point staples with a 1/4″ maximum crown or flathead wood screws treated with a moisture-resistant coating (such as galvanized or zinc). Do not use drywall screws. However, during installation some installers like to fasten underlayment to the subfloor to …