According to the united states census the average roof is 17 squares or about 1 700 square feet.
Roofing average 1200sq ft.
Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30.
The average size roof is about 1500 square ft.
If this distance measures 4 inches you have a 4 in 12 pitch.
When calculating roofing costs per square asphalt shingles run from 350 and 500 per square metal or tin roofs costs 600 to 1 200 per square and concrete or clay costs between 1 200 and 1 800 per square.
However most roofing contractors will price your roof per square meaning 100 square ft.
Of total coverage equals 1 square.
Roofing material is estimated by the square which is equal to 100 square feet.
Or 15 squares in roofing terms.
Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive.
On average a metal shingle roof ranges from 7 to 10 per square foot installed while a standing seam metal roof costs between 10 and 12 per square foot installed.
The average roof is 3 000 square feet or around 30 squares.
Pitch measurement method 2.
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.
Roofing cost per square foot.
Roofing felt is sold by the roll.