Cecil venturella march 3.
Square footage of a roof square.
Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy.
How to calculate square feet of a roof step 1.
The term roofing square and roof pitch are the most commonly used terms in the roofing industry.
Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material.
The calculator cannot account for complex shapes based on a measurement of square footage alone.
Multiply the length and width of each square or rectangle shaped plane.
1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
Use a tape measure to note the length and width of your roof including dormers.
Estimate the pitch of the roof.
The answer is the number of roofing squares for the roof.
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.
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.
Take away overhangs and of course the ratio can go as low as 1 0.
For your safety use a sturdy reliable ladder and secure to your roof.
Wear shoes boots with proper traction.
A roofing square is equal to 100 square feet of the roof.
Calculate each plane separately.
10 feet x 10 feet 100 square feet or 1 roofing square 5 feet x 20 feet 100 square feet or 1 roofing square.
Measure the length and width of every roof plane or surface.
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.
This means you would need 240 squares of shingles to cover that roof.
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.
Steps to measuring roof square footage prepare.
Because each 100 square feet of roof is one roofing square divide the total area from step 1 by 100.
A square is an area of roof which measures 100 square feet.
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.
Include dormers the small outjuttings over attic.
The result is 240 and this means you would need 240 squares of shingles to cover that roof.
Be careful walking around so.
