Roof surfaces are measured in “squares”. A roofing square is equal to 100 square feet of the roof. To determine the number of squares on the gable roof example in this post, divide its total of 2400 square feet by 100 (2400 ÷ 100 = 24). This means you would need 24 squares of shingles to cover that roof.
How do I calculate the size of my roof?
Measure out from the face of the wall below the fascia or rafter tails to a point that aligns with the outer edge of the roof. Multiply this measurement by the length of the roof from end to end, and add this to the first result. Double the result to determine the total area of the roof at both sides.
How do you measure the pitch of a roof from the outside?
Is the square footage of a house the same as the roof?
Square Footage of Your Roof:
So a trick to estimate your roof size is to multiply the square footage of your house by 1.5 (ex: A 2,000 square foot house will have a roof that is approximately 3,000 square feet).
How much does it cost to reroof a 1000 square foot house?
|House (& Roof**) by Square Foot||Re-Roofing Cost*|
|1,000 (1,054)||$4,000 – $5,500|
|1,100 (1,160)||$4,200 – $6,000|
|1,200 (1,265)||$4,500 – $6,500|
|1,500 (1,581)||$5,500 – $8,000|