How To Figure Square Board Feet Needed For Roof

For example a piece of hardwood can be 8 feet long 10 inches wide and 1 25 inches thick.

How to figure square board feet needed for roof. As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house. Measure your house at ground level then add in the roof s overhang for greater accuracy. Measure the height and width of each side. So dividing the area of the roof by 32 will give you the number of sheets needed.

Roof pitches in degrees. Multiply height by width to get that side s surface area in square feet. One sheet 32 ft. For example if your roof is 1 500 ft 2 then it will take 47 sheets of plywood to sheath it.

Substitute these numbers into the board foot formula to find the board footage per piece. Measure gables dormers and any other areas not included in the sides. This basically calculates the number of sheets needed for a gable roof. Board feet length ft width in thickness in 12.

Add side measurements and enter them here. The square footage of a hip roof area is identical to the square footage of a gable roof of the same measurements. Once you have the area you can divide by the area of a sheet of plywood to find the number of sheets needed. Please enter side s surface area.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Choose the dimensions of the boards. Board feet 8 10 1 25 12. Outside of the u s a degree angle is typically used.

A 4 8 sheet of plywood is 32 ft 2.