If the house has an irregular shape measure each part separately figure the separate areas and add them together.
How to measure square feet of a roof.
Pitch measurement method 2 2.
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.
If your roof is 5 000 square feet you will have 50 squares.
Calculate each plane separately.
Convert the area to roofing squares.
How to calculate square feet of a roof step 1.
8 inches and you have an 8 in 12 pitch.
Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements.
Each square is 100 square feet.
Measure the length and width of every roof plane or surface.
If this distance measures 4 inches you have a 4 in 12 pitch.
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.
Include dormers the small outjuttings over attic.
Because each 100 square feet of roof is one.