Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.
Roofing square footage multiplier.
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.
The number you get will be an accurate estimate of how much area you have to cover for your roofing project.
Determine how many square feet of roof area a building has by measuring blueprints or plans.
If you know the pitch of a roof you can use the numbers in the following pitch table to do the following.
Multiply the area by the pitch multiplier to get the roof s square footage.
For the total square footage of the roof.
This roof pitch chart will give you your multiplier.
A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by.
For example a 4 12 pitch roof that is 100 square feet.
Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive.
Multiply 20 and 40 which equals 800.
First multiply the length by the width.
Multiply by the square footage of a single floor of your house.
Find the value of 7 12 from the roof slope multiplier table which is 1 16.
Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.
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.
Roofing material is estimated by the square which is equal to 100 square feet.
If the home measures 20 x 40 and has a 7 12 roof then to calculate the slope of the roof follow these steps.
100 1 054 105 4ft 2.
To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100.
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 step 1 and step 2 i e.
The average roof is 3 000 square feet or around 30 squares.
