How Many Screws Per Sheet Of Plywood Subfloor

A 4 8 sheet of plywood is 32 ft 2.

How many screws per sheet of plywood subfloor.

For example if the area to be covered in plywood is 800 ft 2 then 25 sheets of plywood will be needed to cover it. 800 32 25 sheets. Use 6d common nails spaced 6 apart on edges and 12 apart in the field. Tongue and groove edges on many premium floor panels such as weyerhaeuser s edge gold osb panels are designed to self gap.

If the plywood subfloor you re placing. Divide by the total square footage by the square footage of a sheet of plywood to find the number of sheets required to cover the space. According to table r602 3 1 of international residential code irc subfloor fastener schedule is as follows. The screw count is a bit high at times but this will allow for losing some.

Cement backerboard is a thin layer of concrete with fiberglass mesh on both sides. Whenever you re laying tile on a wood subfloor you need to first install cement backerboard to prevent leaks and water damage. To find out which length of screw you ll need you first have to know how thick the flooring is. To avoid buckling subfloor panels should be spaced with a 1 8 inch gap at all edges and ends to provide room for naturally occurring expansion.

Whether you screw nail or staple your 3 8ths underlayment depends completely upon what flooring product you are planning to put over it. The purpose of an underlayment for vinyl is to have a glass smooth surface to glue to 1 4 ply is the industry standard whereas an underlayment for ceramic tile is to add strength and 3 8ths isn t thick. You ll want the screw to go about an inch past the plywood into the joist or underlying layer beneath it.