What is one of the main reasons to ensure effective water drainage in a BUR system?

Ensuring effective water drainage in a Built-Up Roofing (BUR) system is crucial primarily to prevent water pooling and structural damage. When water accumulates on a roof due to ineffective drainage, it can lead to several issues, including increased weight on the roofing structure, which poses a risk of structural failure over time. Additionally, standing water can accelerate the deterioration of roofing materials, leading to leaks and other forms of moisture-related damage that can compromise the integrity of the building.

Effective drainage systems direct water away from the roofing surface, minimizing the potential for such issues. By avoiding water pooling, BUR systems can maintain their intended lifespan, reducing repair and maintenance costs and preserving the overall functionality of the roof. This aspect is fundamental to the longevity and reliability of any roofing system, particularly BUR, which is designed with multiple layers for durability and protection.