Calculating Square Footage Of A Pitched Roof

How do you calculate square footage for a roof.

Calculating square footage of a pitched roof.

This would yield 1 3. If you don t want to do a lot of measuring you can use your pitch calculation to get an estimated square footage of your roof. For example if your roof s pitch is 4 in 12 you would divide 4 by 12. See the image below for more explanation on rise run and pitch.

So continuing our example if you ve got a two story house with a total square footage of 2 700 square feet with each floor having. Convert the area to roofing squares. To accurately calculate the area of your roof you must first determine its slope or pitch. A 12 in 12 pitch is a steep 45 degree angle roof.

For example take an area made up of a triangle that s 20 feet high and has a base of 40 feet plus a square that s 40 feet by 40 feet. Once you have your roof s pitch divide the number by 12. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing material calculator.

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Multiply by the square footage of a single floor of your house. Multiply the length by the width to arrive at.