What is the minimum pitch for which woven valleys should be installed on a roof?

The minimum pitch for which woven valleys should be installed on a roof is typically 4:12. This pitch provides adequate slope to ensure proper drainage of water, which is crucial in preventing leaks and water damage. At a pitch of 4:12 or steeper, the woven valleys can effectively channel water away from the structure without risking the integrity of the roofing materials. Lower pitches, such as 2:12 or 3:12, can pose problems as they might not shed water adequately, which could lead to pooling and potential leakage over time. A 5:12 pitch, while also suitable for woven valleys, is more than what is required for the minimum standard, making 4:12 the correct choice for ensuring adequate performance and longevity of the roofing system when utilizing this installation method.