Fix Leaking Roof Valley Flashing

Roof vent pipes are common areas for roof leaks.

Fix leaking roof valley flashing.

How to identify a leaking roof and fix it. A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof. Insert a nail in the hole where water is leaking through the roof. If leaks continue to occur from ice dams consider installing roof edge heating cables.

Removing the shingles in the valley area and preparing to install a rubber membrane a metal flashing was installed to give the rubber support for when people walk on the roof this will be the place where they step. Small holes or corroded spots in flashing can be easily repaired. Leaking roof identifying the cause of a leaking roof and how to repair storm damage to roofs. In order to lay the flashing the shingles on the roof will have to be removed.

A metal lining under the membrane secures that the valley will never puncture again. Plug pinholes with roofing cement and patch holes up to about 3 4 inch in diameter with a patch from the same material as the flashing. If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof. In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing.

First roughen the area around the hole with a wire brush or sandpaper and then clean it. And damaged flashing is behind most roof leaks. Metal flashing is used to divert water. Roof vent pipes from plumbing or exhaust vents penetrate the roof and are usually sealed using a collar style flashing made out of a flexible material like epdm rubber or flexible pvc.

A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in. This project identifies some of the causes of leaking roofs including damage to ridge tile mortar damage to verge tile mortar damage to lead flashing around the chimney stack and how damage can occur in a roof valley. Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters.

Find them locally at hardware stores or home centers. The nail will provide a path for the water.