Section off your roof and write your calculations down as shown below (Dotted Lines). And then I will count the # of rows of shingles between the gutter and the peak of the roof and then divide the number by 2, which gives me the height measurement. Rounding before you begin multiplying and adding may throw off the accuracy of your final estimate. On your next roofing estimate, I suggest that you compare the total square footage number you get by actually measuring a roof to the number you end up with after using these 2 little calculations. Did I mention that it is highly accurate, as well? To sum it up, each individual tab on a 3-tab shingle measures approximately 12″ wide by 6″ high. The roof pitch is measured by how much the roof … Include your email address to get a message when this question is answered. If you’re using a 2 ft (0.61 m) level, divide the distance between the level and the roof by 2 to get the true pitch. This has shed a light on my getting great pictures and how to accurately measure the roof from the ground. No. The pitch of a roof, or roof slope, helps determine how quickly excess water, snowfall, or debris will fall off of the roof. If a section is 120 feet (37 m) x 100 feet (30 m), its total square footage would be 12,000 square feet (1,100 m. Be sure to find the area of any dormers on your roof, as well. 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. Always order 10% more materials than you think you need to account for waste, and round up to make sure you don't come up short. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. There is a right way. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/17\/Measure-a-Roof-Step-12-Version-2.jpg\/v4-460px-Measure-a-Roof-Step-12-Version-2.jpg","bigUrl":"\/images\/thumb\/1\/17\/Measure-a-Roof-Step-12-Version-2.jpg\/aid1152657-v4-728px-Measure-a-Roof-Step-12-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

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