What is a common requirement for low slope roofing materials?

Low slope roofing materials must be water-resistant to effectively prevent water infiltration and moisture accumulation, which are critical factors in maintaining the structural integrity of a building. The design of low slope roofs typically involves a minimal slope, which can hinder adequate drainage. Therefore, selecting materials that possess water-resistant properties is essential to safeguard the underlying decking and insulation from water damage, mold growth, and other moisture-related issues.

While other factors such as reflectivity and weight can play a role in the performance of roofing materials, the primary concern for low slope roofing is the ability to repel water. This characteristic ensures that any water that does accumulate does not penetrate the roofing system, thus preserving the longevity and reliability of the roof.