How to calculate square feet of a roof step 1.
How to measure square feet of a roof.
If its pitch is 6 in 12 a pitch multiplier of 1 12 multiplying 1 152 sq ft 107 0 m 2 by 1 12 would give you an overall square footage of 1 290 square feet 120 m 2.
Each square is 100 square feet.
Pitch measurement method 2 2.
Because each 100 square feet of roof is one.
Calculate each plane separately.
Step 1 understand your roof surface a home s roof is measured in squares.
If your roof is 5 000 square feet you will have 50 squares.
8 inches and you have an 8 in 12 pitch.
Multiply the length and width of each square or rectangle shaped plane.
If the house has an irregular shape measure each part separately figure the separate areas and add them together.
How to calculate your roof square footage first measure the length and width of each surface on the roof then multiply these values to get the square footage of that surface.
On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof.
If your roof measures 48 feet 15 m x 24 feet 7 3 m multiplying its length by its width would give you a square footage of 1 152 square feet 107 0 m 2.
Convert the area to roofing squares.
Include dormers the small outjuttings over attic.