How Much Plywood Do I Need For My Roof

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.

How much plywood do i need for my roof.

Multiply the width and length of each slope and you should get the square footage of that slope. Let s say that your roof has a total of 1 500 square feet. The calculation is based on that the plywood or osb oriented strand board sheets are of a 4 x 8 size. We also carry pre cut project panels that are available in different sizes that may vary by store.

A typical 4 foot by 8 foot sheet of plywood covers 32 square feet. It will support roof. That is dependent on the lay out and where it ends with the plywood. A 4 8 sheet of plywood is 32 ft 2.

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. 800 32 25 sheets. The square footage of a hip roof area is identical to the square footage of a gable roof of the same measurements. Add an additional 10 for waste and mistakes.

The number you ll get is the number of sheets that you need. One sheet 32 ft. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. The most common size for plywood sheets is 4 x 8 feet followed by 5 x 5 feet.

No calculator can tell how much waste will be on each run plywood. These project panels help eliminate waste cut costs and are easier to transport than full size panels. Divide the total roof area by 32 to get the number of sheets you will need to cover the roof. For example if your roof is 3 000 square feet divide 3 000 by 32.

For a shape like a circle pentagon hexagon or octagon find 25 of the width and measure the length at that point. 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. Divide that by 32 the square footage of each 4 8 plywood sheet. This basically calculates the number of sheets needed for a gable roof.

Estimate the amount of plywood or osb needed for sheathing a roof. A 4 8 sheet of plywood is 32 ft 2. 1 500 32 46 875 sheets. After all it keeps water out of the building.

Add at least six feet for waste. Multiply that by 2 if you have a gable roof and that s the total square footage of your roof. For example if your roof is 1 500 ft 2 then it will take 47 sheets of plywood to sheath it. In this case you need 47 sheets rounded off from 46 88.

And while nobody likes having to pay to replace a roof the critical and aesthetic function it serves should help ease the pain of spending 8 000 to 20 000 on the work. So dividing the area of the roof by 32 will give you the number of sheets needed.