Measure the length and width of every roof plane or surface.
Square footage of a roof square.
Multiply the length and width of each square or rectangle shaped plane.
A roofing square is equal to 100 square feet of the roof.
The calculator cannot account for complex shapes based on a measurement of square footage alone.
Take away overhangs and of course the ratio can go as low as 1 0.
Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.
For your safety use a sturdy reliable ladder and secure to your roof.
To determine the number of squares on the gable roof above simply divide its total of 24 000 square feet by 100.
Be careful walking around so.
Calculate each plane separately.
Change the 2000sf dimensions to 45x44 4 feet with ridge along the 45 dimension you get 51x50 4 roof plan footage 2570 sf flat or 3635 at 12 12 slope.
To determine the number of squares on the gable roof example in this post divide its total of 24 000 square feet by 100 24 000 100 240.
Estimate the pitch of the roof.
The term roofing square and roof pitch are the most commonly used terms in the roofing industry.
Include dormers the small outjuttings over attic.
10 feet x 10 feet 100 square feet or 1 roofing square 5 feet x 20 feet 100 square feet or 1 roofing square.
In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area.
Cecil venturella march 3.
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.
1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
Just those two examples give you a range of from 1 3 times footprint square footage to almost 2 times for a one story house.
A square is an area of roof which measures 100 square feet.
Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.
The answer is the number of roofing squares for the roof.
Steps to measuring roof square footage prepare.
Use a tape measure to note the length and width of your roof including dormers.
1 roofing square 100 square feet.
Wear shoes boots with proper traction.
How to calculate square feet of a roof step 1.
The result is 240 and this means you would need 240 squares of shingles to cover that roof.