How much can heavy asphalt shingles with multiple layers weigh per square?

Heavy asphalt shingles with multiple layers can weigh around 500 pounds per square. A "square" in roofing terms refers to a 10-foot by 10-foot area, or 100 square feet. This weight is significant because it influences the structural integrity of the roof and the supporting framework.

When assessing the impact of heavy shingles, it’s crucial to consider the materials used in the roof's structure and framing, as well as local building codes, which may impose weight limits. Understanding these weights is vital for inspectors to evaluate whether existing structures can support the additional load without risk of sagging or failure over time. Knowledge of roofing materials like asphalt shingles is essential for home inspectors when assessing roof conditions, maintenance needs, and potential concerns regarding structural safety.