Roofing Square Footage Multiplier

If the home measures 20 x 40 and has a 7 12 roof then to calculate the slope of the roof follow these steps.

Roofing square footage multiplier.

This roof pitch chart will give you your multiplier. First multiply the length by the width. Roofing material is estimated by the square which is equal to 100 square feet. Multiply 20 and 40 which equals 800.

Determine how many square feet of roof area a building has by measuring blueprints or plans. If your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width. 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. Multiply by the square footage of a single floor of your house.

100 1 054 105 4ft 2. Determine how many square feet of roof area a building has by measuring from the ground. Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. 800 multiplied by 1 16.

To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100. Multiply step 1 and step 2 i e. Plane 1 plane 2 24 000 sq. Then take the product of these two dimensions and multiply it by your pitch multiplier.

Find the value of 7 12 from the roof slope multiplier table which is 1 16. For example a 4 12 pitch roof that is 100 square feet. It is often compared to slope but is not exactly the same. Multiply the area by the pitch multiplier to get the roof s square footage.

A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by. If you know the pitch of a roof you can use the numbers in the following pitch table to do the following. The average roof is 3 000 square feet or around 30 squares. The number you get will be an accurate estimate of how much area you have to cover for your roofing project.

For the total square footage of the roof. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.