Why is it important to ensure proper ventilation in BUR systems?

Ensuring proper ventilation in Built-Up Roofing (BUR) systems is crucial primarily to prevent heat buildup and the associated moisture issues. When a BUR system lacks adequate ventilation, heat can accumulate beneath the roofing material. This excessive heat can lead to elevated temperatures on the roof deck, which can damage the roofing materials over time. Additionally, warm, moisture-laden air can become trapped, potentially leading to condensation issues. This trapped moisture can promote the growth of mold and mildew, further compromising the roof's structure and integrity.

Maintaining proper ventilation helps balance temperature fluctuations and allows for the escape of moisture, contributing to a healthier roofing system. While proper ventilation can also contribute to other factors such as the lifespan of the roofing materials and overall structural integrity, the primary concern is to mitigate heat buildup and prevent moisture-related problems. Therefore, the emphasis on heat and moisture control is a fundamental reason for ensuring adequate ventilation in BUR systems.