How To Measure Square Foot Of A Roof

You will need to express this size in terms of square feet.

How to measure square foot of a roof. The length l times the height h of a triangle is twice its area a2. The first step in a free roofing estimate is measuring the roof dimensions. Outside of the u s a degree angle is typically used. 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.

Shingles and other roofing materials such as underlayment are typically measured in squares that are 10 feet long and 10 feet wide with each square measuring 100 square feet. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. 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. 1 roof square 100 square feet.

If your roof is 5 000 square feet you will have 50 squares. L 30 feet h 12 feet 30 12 2 180 square feet. Multiply the length by the width to arrive at the ground area of the house. Before you do any roofing work you must calculate the roof s square footage to determine how much material you need.

If the house has an irregular shape measure each part separately figure the separate areas and add them together. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. Each square is 100 square feet.