What additional classifications must asphalt shingles meet when labeled for compliance?

When asphalt shingles are labeled for compliance, they must meet ASTM classifications. The American Society for Testing and Materials (ASTM) establishes a variety of standards that ensure materials meet certain performance requirements, durability, and safety measures. Specifically for roofing materials, ASTM standards dictate various tests that shingles must pass, including requirements for wind resistance, granule loss, and water penetration. These classifications help ensure that the asphalt shingles perform effectively in real-world conditions, enhancing their reliability and safety for use in roofing applications.

Understanding the significance of ASTM classifications is crucial for manufacturers, contractors, and consumers, as it assures that the products meet the level of quality and performance necessary for various environmental conditions and building codes.