How Much Plywood For A Roof

One sheet 32 ft.

How much plywood for a roof.

A roof that lays practically flat will have a much heavier load than a steeper roof that allows rain snow and ice to roll right off. A 4 8 sheet of plywood is 32 ft 2. The calculation is based on that the plywood or osb oriented strand board sheets are of a 4 x 8 size. However you may need to consider bolstering the plywood thickness for a roof that has a higher load.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. We also carry pre cut project panels that are available in different sizes that may vary by store. In this case plywood should be a minimum of 3 8 inch thick. It will support roof.

1 500 32 46 875 sheets. The square footage of a hip roof area is identical to the square footage of a gable roof of the same measurements. 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.

Then i do a metal drip edge to cover it all. For example if your roof is 3 000 square feet divide 3 000 by 32. The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet. These project panels help eliminate waste cut costs and are easier to transport than full size panels.

On my shed my sheathing does not protrude actually how both my house and shed are done is a 1 x 6 house 1 x4 shed fascia is installed to end of rafters then 1 x 1 1 2 is tacked onto the fascia at the top. This comes out to about 94 sheets of 4 x 8 plywood. The roof sheathing comes down and ends on top of the 1 x fascia. This basically calculates the number of sheets needed for a gable roof.

So dividing the area of the roof by 32 will give you the number of sheets needed. Divide the roof s area by 32 32 is the total area of one sheet of plywood to find this figure. 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. If your roof area is 1 600 square.

800 32 25 sheets. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Add an additional 10 for waste and mistakes. For example if your roof is 1 500 ft 2 then it will take 47 sheets of plywood to sheath it.