What is the proper drainage requirement for low slope roof systems under normal dry conditions?

The proper drainage requirement for low slope roof systems under normal dry conditions is that drainage should occur within 48 hours following a rainfall. This guideline is crucial for maintaining the integrity and longevity of low slope roofs, which are more susceptible to issues related to standing water due to their pitch. Prolonged exposure to water can lead to leaks, mold, and deterioration of roofing materials.

Timely drainage is important to prevent water accumulation which can add extra weight and stress on the roof structure, and can also promote the growth of algae and moss that may compromise the roofing material. By ensuring that all water is drained within a 48-hour timeframe, roofing systems can effectively manage water runoff and help maintain their overall performance and durability. This requirement not only serves a practical purpose but also aligns with industry standards for maintaining low slope roof systems in good condition.