Measuring Roof Size

We ll use satellite imagery and trigonometry to calculate your roof s measurements.

Measuring roof size.

Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements. 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. The length l times the height h of a triangle is twice its area a2. 1 roof square 100 square feet.

L h 2 area calculating an area of a triangle when estimating a roof. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. After you ve done this you can click along the outer edge of the roof that you wish to calculate the area for. It will also give you the perimeter of the shape of 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. Each time you add points the area will update and there is a box below that will convert this into acres meters kilometers miles and finally square feet. So if you divide your answer of a product of length times height by two you will get the area of a triangle. Roof reports and wall reports made easy.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.