What is the recommended practice when installing BUR plies?

The recommended practice when installing Built-Up Roofing (BUR) plies is to do so in a single day. This approach allows for consistent application and ensures proper adhesion between the layers of roofing materials. When BUR plies are installed all at once, it helps to maintain the integrity of the roofing system, minimizing potential issues that can arise from weather changes or improper curing between layers.

Installing all layers in one day helps avoid complications such as misalignment, insufficient bonding, or weakness in the seams that could lead to leaks or other failures. Furthermore, it ensures that the materials used are applied under similar conditions, which is crucial for achieving optimal performance and longevity of the roofing system. In contrast, applying BUR layers over multiple days can increase the risk of external factors affecting the adhesion and performance of the plies.