How To Figure Plywood For A Roof

This will give you the total number of sheets to buy.

How to figure plywood for a roof.

Follow theses guidelines for a closer estimation. The calculation is based on that the plywood or osb oriented strand board sheets are of a 4 x 8 size. The calculation is based on 4 x 8 sheets 32 square feet each. 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. One 4 by 8 foot sheet of osb or plywood is 32 square feet. Calculate how many sheets of plywood are needed. The square footage of a hip roof area is identical to the square footage of a gable roof of the same measurements.

A 12 in 12 pitch is a. Divide the roof s area by 32 32 is the total area of one sheet of plywood to find this figure. Add 20 percent to that figure to allow for the roof slope which results in 1 320 square feet of roof area. Divide 1 320 by 32 to get 41 plywood sheets.

For a shape like a triangle gables and hips trapezoid hip side with the ridge or trapezium gable roof with a valley. 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. Take the roof s total square footage and divide by 32.

This basically calculates the number of sheets needed for a gable roof. A 4 8 sheet of plywood is 32 ft 2. Find the area of a roof. Roof sheathing hip roof imperial calculator estimate the number of sheets of plywood or osb that are needed for sheathing a hip roof.

For example if your roof is 3 000 square feet divide 3 000. Once the area is known divide by the area of a 4 8 sheet to find how much sheathing is needed. Find the average length by measuring at the center of. 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.

Things you will need. One sheet 32 ft. To find the amount of plywood needed to cover a roof start by finding the area of the roof. Solving for the number of sheets of plywood necessary for more complicated shapes requires at least some estimating.

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.