What role does the surface aggregate play in built-up roofing systems?

The surface aggregate in built-up roofing systems plays a crucial role in protecting the roof from various external forces and enhancing its durability. By providing a layer of protection, the aggregate acts as a barrier against weathering caused by environmental factors such as UV radiation, rain, and temperature fluctuations. This protection helps to extend the lifespan of the roofing system. Additionally, the weight of the aggregate assists in preventing wind uplift, which can be a significant concern in regions prone to high winds.

The aggregate's function goes beyond mere aesthetics; it is integral to maintaining the integrity of the roofing system over time, ensuring that it withstands harsh conditions while minimizing the risk of damage or failure.