Business & Contracts
What is Slope Factor?
Roofing Glossary · Business & Contracts
Definition
A multiplier applied to a home's footprint area to calculate the actual roof surface area, accounting for the additional surface created by the roof's pitch. A flat roof has a slope factor of 1.0. A 6:12 pitch has a factor of approximately 1.12, and a 12:12 pitch has a factor of 1.41. Slope factor directly determines the number of squares of material required and the additional labor cost for steep-pitch installation.
Related Roofing Terms
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Roof PitchThe steepness of a roof expressed as a ratio of vertical rise to horizontal run — for example, 6:12 ...
→Square FootageThe total surface area of a roof measured in square feet, calculated from the home's footprint adjus...
→Square (Roofing)The standard unit of measurement for roofing materials and project pricing equal to 100 square feet ...
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