How Many Screws Per Sheet Of Plywood Subfloor

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.

How many screws per sheet of plywood subfloor.

So if your subfloor is 3 4 of an inch thick any screw about 1 3 4 inches long will do the trick. Tongue and groove edges on many premium floor panels such as weyerhaeuser s edge gold osb panels are designed to self gap. 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. To find out which length of screw you ll need you first have to know how thick the flooring is.

800 32 25 sheets. According to table r602 3 1 of international residential code irc subfloor fastener schedule is as follows. 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. A 4 8 sheet of plywood is 32 ft 2.

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. If the plywood subfloor you re placing. Use 6d common nails spaced 6 apart on edges and 12 apart in the field.

You ll want the screw to go about an inch past the plywood into the joist or underlying layer beneath it. 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. This simple sub floor materials calculator will provide you with the lineal feet of floor joist needed the number of sheaths to cover the floor and how much glue and how many screws it takes to attach the sheathing to the joist.