What is the accepted minimum slope for standing seam roofs?

The accepted minimum slope for standing seam roofs is 2%. This slope is established to ensure proper drainage, which is critical for preventing water accumulation on the roof surface. Adequate drainage helps mitigate the risk of leaks and prolongs the lifespan of the roofing material.

Standing seam roofs are designed to channel water away effectively, and a slope of at least 2% allows for gravity to assist in the movement of water toward the eaves or designated drainage points. If the slope is insufficient, as seen with lower pitches, water can pool, potentially leading to premature wear, rust, and other moisture-related issues.

While steeper slopes, such as those represented in the other answer choices, can provide even better drainage and are sometimes recommended for specific applications, a 2% slope remains the minimum standard to ensure functional performance and maintain warranty requirements by roofing manufacturers.