What is the significance of weight per square in roofing materials?

The significance of weight per square in roofing materials primarily relates to durability and longevity. In roofing terminology, a "square" refers to a unit of area that measures 100 square feet. The weight of roofing materials is a critical factor that affects their performance over time. Heavier materials often indicate a higher density and a more robust construction, which can lead to greater resistance to environmental factors such as wind, hail, and heavy rainfall.

Roofing materials with appropriate weight specifications are typically designed to provide long-lasting protection, maintaining their integrity through various weather conditions. For instance, materials like slate or certain types of asphalt shingles have specific weights that correlate with their expected lifespan and protective qualities. Therefore, understanding the weight per square is essential for assessing the overall performance of a roofing system and its ability to endure typical stresses associated with a roofing environment, which ultimately contributes to longevity and reliability.