What are the components of a flood coat?

A flood coat is a specific application in the built-up roofing (BUR) system that involves applying a layer of bitumen followed by loose aggregate. The primary purpose of this application is to provide a protective layer over the roofing membrane, enhancing its durability and longevity.

Bitumen serves as a waterproofing agent and provides a cohesive layer that binds the roof components together, while the aggregate (typically gravel or stone) offers additional protection against UV rays, physical damage, and wear from environmental elements. This combination forms a robust surface that helps to extend the life of the roofing system and ensure it can withstand various stresses.

The other options introduce components that do not accurately represent the typical makeup of a flood coat. Rigid insulation, elastomeric layers, and reflective coatings serve different purposes within the roofing system and are not part of the flood coat application process. Understanding the role of each component in BUR systems is essential for proper installation and maintenance practices.