What is a primary benefit of using bitumen in BUR systems?

Bitumen is a key ingredient in Built-Up Roofing (BUR) systems primarily because it provides excellent waterproofing and adhesion. This material creates a barrier that effectively prevents water from penetrating the roofing system, which is essential for protecting the underlying structure from potential water damage. The adhesive properties of bitumen also allow it to bond well with other layers of the roofing system, ensuring that the layers adhere properly to each other and to the substrate. This strong bond is critical for maintaining the integrity of the roof over time, especially in varying weather conditions.

While other factors such as weight, cost, and aesthetics are considered in roofing systems, the core advantage of bitumen lies in its fundamental role in waterproofing and ensuring the durability and longevity of BUR roofs. This characteristic is crucial in extending the life of a building's roofing system and preventing costly repairs or replacements due to leaks or other water-related damage.