Screws Per Sheet Of Sub Floor

The screw count is a bit high at times but this will allow for losing some.

Screws per sheet of sub floor. Use 6d common nails spaced 6 apart on edges and 12 apart in the field. Drill screws through the backerboard sheets every 6 to 8 inches. Man that s a lot of screws. Apply glue per manufacturer s specifications.

Drive the screws in so that the heads are slightly below the surface of the backerboard sheet. I ve done a few 4x8 planks with screws at that frequency. Nail spacing for sheets of osb and plywood is 8 inches per nail. The floor looks like the skin of an airplane with so many screws around the perimeter.

According to table r602 3 1 of international residential code irc subfloor fastener schedule is as follows. Use a solvent based glue that meets astm d3498 performance standards. Am i on the right track. This means that you ll need to use six nails per each truss that runs under the sheathing because each sheet measures 4 feet wide by 8 feet long.

According to construction and renovation experts some of the best screws for subfloor include the senco 08200y screws the simpson strong tie screws and the hillman group 48248 subfloor screws. Position the screws at least 1 2 inch but no more than 2 inches from the edge of the sheet. Attach the smaller piece to the subfloor with a 1 inch wood screw every six inches in each direction using a power drill. I ve read for nailing the underlayment to do one nail every foot in the interior of the plywood and around the perimeter at 2.

4 feet equals 48 inches which you then divide by 8 to determine that you ll need six nails where the board comes in contact with a truss. Be sure the joists are dry and free of dirt before applying. In cases where latex subfloor glue is required careful selection is necessary due to the wide range of performance between brands.