How To Figure Plywood For A Roof

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.

How to figure plywood for a roof.

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. Divide the roof s area by 32 32 is the total area of one sheet of plywood to find this figure. Solving for the number of sheets of plywood necessary for more complicated shapes requires at least some estimating.

Divide 1 320 by 32 to get 41 plywood sheets. You should be prepared to have about 15 percent waste so multiply your figure by 1 15. To accurately calculate the area of your roof you must first determine its slope or pitch. A 12 in 12 pitch is a.

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. Add 20 percent to that figure to allow for the roof slope which results in 1 320 square feet of roof area. Things you will need. Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed.

One 4 by 8 foot sheet of osb or plywood is 32 square feet. The calculation is based on 4 x 8 sheets 32 square feet each. Calculate how many sheets of plywood are needed. Multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof in square feet.

Follow theses guidelines for a closer estimation. A 4 8 sheet of plywood is 32 ft 2. For example if your roof is 3 000 square feet divide 3 000. This will give you the total number of sheets to buy.

Roof sheathing hip roof imperial calculator estimate the number of sheets of plywood or osb that are needed for sheathing a hip roof. Find the average length by measuring at the center of. 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. To find the amount of plywood needed to cover a roof start by finding the area of the roof.

For a shape like a triangle gables and hips trapezoid hip side with the ridge or trapezium gable roof with a valley. One sheet 32 ft. If you know you ll be using 4 foot by 8 foot sheets of plywood use the total roof area to find the set number of sheets you ll need. Take the roof s total square footage and divide by 32.

The calculation is based on that the plywood or osb oriented strand board sheets are of a 4 x 8 size.