Measuring a roof for shingles is an important step in the process of installing a new roof or replacing an old one. Here are the steps to measure a roof for shingles:
1. Calculate the square footage of the roof: Start by determining the length and width dimensions of each roof section. To calculate the overall square footage of the roof, multiply the length by the width to get how many square feet each section has.
2. Calculate the pitch: The slope or pitch of the roof will also determine how many shingles are required. The rise, or vertical distance, and run, or horizontal distance, of the roof are measured in order to determine the pitch. The pitch is then expressed as a ratio, such as 6:12 or 9:12.
3. Calculate the waste factor: To account for waste and cuts made during the installation of the shingles, a waste factor of 10% is normally added to the square footage.
4. Choose the right shingle size: Finally, shingles are offered in bundles that each cover a specific amount of square footage. To calculate the required number of bundles, divide the entire square footage by the shingle bundle’s coverage area.