Roof Valley Leaking

Sometimes the water shows up at a ceiling spot distant from the leak.

Roof valley leaking.

Roof valley leaks valleys in your roof are locations where two roof planes intersect and form a v shaped valley that runs down a slope of your roof. Most roofers that install shingles will not have rubber membranes with them to do such areas. In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing. A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof.

The reason why the roof valley is such a sensitive area has to do with all the rainwater and or melting snow that accumulates and flows through the valley on its way into the gutters. The right thing to do here is to pull a valley basically pull a valley apart and rebuild it. Most shingle installers will use a thick 30 lb paper as a base for the valley. Many roof valley leaks are caused by roofing nails that have been poorly placed and are acting as a dripper feeding water through from the roof above.

Valley areas are prone to leak due to the lack of using proper materials. Often water runs to openings in the vapor barrier such as at ceiling light fixtures. And if they put a second layer of shingles on they brought it up the valley but they didn t replace the valley it s probably leaking and cracking and split. Roof valley leaks roof valleys are created wherever two roof surfaces intersect to form a shallow v shape.

They are common on both hip and gable roofs. And damaged flashing is behind most roof leaks. Roof valleys carry a lot of water. Although professional roofers take great care to properly install roof valleys they can be susceptible to roof leaks.

If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic. A roof valley is very prone to leaks especially if you have an older roof. Most roofers that do shingles will use a heavy base paper instead of a rubber membrane.