How To Measure Sq Feet Of Roof

How to calculate square feet of a roof step 1.

How to measure sq feet of roof.

Roof pitches in degrees. As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house. Measure the length and width of every roof plane or surface. Calculate each plane separately.

Check that your footage measurements are within this range so you can start off on the right foot. Because each 100 square feet of roof is one. Multiply the length and width of each square or rectangle shaped plane. 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. The calculator cannot account for complex shapes based on a measurement of square footage alone. 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. In cases where a roof has a complex shape such as in the image to the right measuring the dimensions and areas of each part of the roof to calculate total area will result in a more accurate measurement of area.

Next you will need to use a roofing materials calculator. Simply input the surface area of the roof choose from one of the available options and you will get your first roofing estimate. If the house has an irregular shape measure each part separately figure the separate areas and add them together.