It is often compared to slope but is not exactly the same.
Roofing square footage multiplier.
Multiply the area by the pitch multiplier to get the roof s square footage.
First multiply the length by the width.
For example a 4 12 pitch roof that is 100 square feet.
Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.
If you know the pitch of a roof you can use the numbers in the following pitch table to do the following.
100 1 054 105 4ft 2.
The average roof is 3 000 square feet or around 30 squares.
For the total square footage of the roof.
Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive.
A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by.
Determine how many square feet of roof area a building has by measuring blueprints or plans.
Multiply by the square footage of a single floor of your house.
Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.
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.
Roofing material is estimated by the square which is equal to 100 square feet.
Multiply step 1 and step 2 i e.
800 multiplied by 1 16.
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.
Plane 1 plane 2 24 000 sq.
This roof pitch chart will give you your multiplier.
The number you get will be an accurate estimate of how much area you have to cover for your roofing project.
Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.
If the home measures 20 x 40 and has a 7 12 roof then to calculate the slope of the roof follow these steps.
Find the value of 7 12 from the roof slope multiplier table which is 1 16.
Determine how many square feet of roof area a building has by measuring from the ground.
Then take the product of these two dimensions and multiply it by your pitch multiplier.
