Roofing Square Footage Multiplier

Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.

Roofing square footage multiplier.

Roofing material is estimated by the square which is equal to 100 square feet. This roof pitch chart will give you your multiplier. To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100. 800 multiplied by 1 16.

Multiply the area by the pitch multiplier to get the roof s square footage. 100 1 054 105 4ft 2. Determine how many square feet of roof area a building has by measuring from the ground. Multiply by the square footage of a single floor of your house.

Then take the product of these two dimensions and multiply it by your pitch multiplier. Roof surfaces are measured in squares a square is an area of roof which measures 100 square feet. 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. Multiply step 1 and step 2 i e.

Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. For the total square footage of the roof. It is often compared to slope but is not exactly the same. The average roof is 3 000 square feet or around 30 squares.

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. Determine how many square feet of roof area a building has by measuring blueprints or plans. 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.

Plane 1 plane 2 24 000 sq. For example a 4 12 pitch roof that is 100 square feet. If you know the pitch of a roof you can use the numbers in the following pitch table to do the following. First multiply the length by the width.

Multiply 20 and 40 which equals 800. Find the value of 7 12 from the roof slope multiplier table which is 1 16. A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by.