Which characteristic is important for the longevity of BUR systems?

The longevity of Built-Up Roofing (BUR) systems is significantly influenced by their resistance to ultraviolet (UV) radiation. UV rays can cause materials to degrade over time, leading to issues such as cracking, discoloration, and loss of waterproofing properties. A BUR system that exhibits strong resistance to UV radiation will maintain its integrity and function effectively over an extended period, minimizing the need for repairs or replacement.

By contrast, while adaptability to temperature variations, low installation costs, and availability of multiple color options may play a role in the effectiveness or preference for a specific roofing system, they do not directly contribute to the durability or lifespan of BUR systems in the same way that UV resistance does. Ensuring that the selected roofing material can withstand UV exposure helps ensure that the roof remains effective at protecting the building from environmental challenges throughout its lifecycle.