Roof Valley Leaking

Roof valleys carry a lot of water.

Roof valley leaking.

Valley areas are prone to leak due to the lack of using proper materials. Most roofers that install shingles will not have rubber membranes with them to do such areas. Most shingle installers will use a thick 30 lb paper as a base for the valley. Although professional roofers take great care to properly install roof valleys they can be susceptible to roof leaks.

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. And damaged flashing is behind most roof leaks. 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. They are common on both hip and gable roofs.

The goal is to find the leak before the entire roof goes bad. In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing. Roof valley leaks roof valleys are created wherever two roof surfaces intersect to form a shallow v shape. This video shows the traditional and best way to repair a lead valley on a roof.

Finding the actual spot where the roof leaks is difficult because water can enter the roof in one place and run down to another before it starts soaking into the ceiling. Most roofers that do shingles will use a heavy base paper instead of a rubber membrane. This method of lead valley repair is proven to not only be fast and safe wit. A roof valley is very prone to leaks especially if you have an older roof.

Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. From drip edge to valley flashing december 25 2018 drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies. You know the roof is bad if shingles are missing or obviously damaged or when water stains the ceiling or walls. Valleys can be especially troublesome because they carry a lot of water during heavy rain.