How To Measure Roof Sq Ft

L h 2 area calculating an area of a triangle when estimating a roof.

How to measure roof sq ft.

For example if your home is 60 feet long and 40 feet wide you would multiply the length by the width and come up with 2 400 square feet. If this distance measures 4 inches you have a 4 in 12 pitch. Pitch measurement method 1. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. Next you will need to use a roofing materials calculator. How to calculate square feet of a roof step 1. Measure the ground dimensions of the house using a tape measure and write down these dimensions.

Check that your footage measurements are within this range so you can start off on the right foot. Measure the length and width of every roof plane or surface. Outside of the u s a degree angle is typically used. 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.

This number will provide you the level area beneath the roof. This is simply 100 square feet of roof. The length l times the height h of a triangle is twice its area a2. The roof surface area would be 24.

Multiply the length and width of each square or rectangle shaped plane. Calculate each plane separately. 8 inches and you have an 8 in 12 pitch. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

How do you calculate square footage for 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. Convert the area to roofing squares. Include dormers the small outjuttings over attic.

For instance if the roof is 1550 square feet then it is 16 squares. Because each 100 square feet of roof is one roofing square divide. To find the squares divide the overall roof area by 100 and then round up. To convert the square footage to roof squares divide the square footage by 100.

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. 1 roof square 100 square feet.