What does one square of composite shingles cover?

One square of composite shingles covers 100 square feet. This is a standard measurement in roofing, where a "square" is used to represent the area that roofing materials will cover. In the roofing industry, it's common to use this term to facilitate easier calculations for material estimates and project budgeting. Understanding this measurement is crucial for accurately determining how many squares will be needed to complete a roofing project, ensuring that enough material is ordered while also staying cost-effective. This standardized coverage helps professionals plan their work efficiently and accurately.