Roof performance rating is a measure of how well a roofing system performs under various conditions such as wind, rain, fire, and temperature changes. It helps determine the suitability of materials for specific climates. In British Columbia, high-performance roofing systems are required due to heavy rainfall and wind exposure. Ratings consider durability, waterproofing efficiency, energy performance, and structural integrity. Higher-rated systems typically offer longer lifespan and lower maintenance requirements.
