Detailing valleys on clay tile roofs involves specific techniques to ensure proper water drainage and prevent leaks. Clay tile valleys are most commonly installed using three methods: woven, closed-cut, and open metal valley installations. The woven valley style interlocks tiles from both sides of the valley, providing a seamless, traditional look that directs water down the valley naturally. Closed-cut valleys use metal flashing that is embedded under the tile edges, where one side of the valley is cleanly cut and overlapped by the other side’s tiles, creating a neat, painted or metal-lined finish. Open metal valleys prominently feature a metal channel that is exposed in the valley’s low point, allowing water to flow freely. Issues typically arise from improper placement or flashing degradation, leading to water infiltration. Diagnosing problems safely involves inspecting the valley for cracked or displaced tiles, evident rust or damage on metal flashing, and debris buildup, all while ensuring you keep stable footing on the roof or use binoculars for a close-up view from the ground.
If you’re comfortable with basic checks, observe whether tiles sit flush without gaps along the valley lines and confirm metal flashing edges are intact and securely fastened. Avoid walking heavily on clay tiles to prevent breakage. When you notice missing tiles, damaged flashing, or suspect leaks in valleys, it’s wise to contact a roofer who specializes in clay tile work. A good question to ask your contractor is how they plan to integrate the chosen valley style with the existing roof tile layout and what warranty they offer on both labor and materials, especially the metal components prone to rust. Also, inquire if they use any sealants or underlayments compatible with the clay tile and designed to enhance water resistance while maintaining the roof’s breathability and durability. This approach ensures the valley details last and your roof remains secure under various weather conditions.