What roofing material is specified for the water harvesting system?

Galvanized standing seam roofing is specified for water harvesting systems primarily due to its durability and ability to effectively channel rainwater. This type of roofing is constructed from metal panels that are joined together at the seams, creating a continuous, smooth surface that minimizes the accumulation of debris and promotes efficient water runoff.

Metal roofs are also non-porous, which helps prevent contaminants from leaching into the water supply, thus ensuring cleaner harvested rainwater. Additionally, galvanized steel is resistant to rust and weather damage, making it a reliable material for long-term water harvesting applications. The smooth surface encourages quick drainage, which is essential to maximize the harvesting capacity during rain events.

In contrast, other roofing materials such as slate tiles, asphalt shingles, and clay tiles can present challenges in a water harvesting context. Slate tiles can be heavy and may crack, potentially compromising the integrity of the system. Asphalt shingles, while common, can shed granules that might contaminate the harvested water. Clay tiles, while durable and aesthetically pleasing, can be less effective at channeling water efficiently due to their design and the potential for debris accumulation in the tile spaces. Thus, galvanized standing seam roofing stands out as the most suitable choice for a water harvesting system due to its combination of functionality