Roof Leak Dormer Valley

3 deteriorated caulk around window and sill.

Roof leak dormer valley.

Most shingle installers will use a thick 30 lb paper as a base for the valley. Place the legs of an extension ladder on level solid ground beneath the dormer where you expect to find the roof. Valley areas are prone to leak due to the lack of using proper materials. This is one type of leak where experience can give a big advantage in locating and fixing the problem.

Dormer valleys looking for roof leaks on the outside of your house. Isolate areas when you run the hose. A roof leak at the edge of a dormer can allow a lot of water to enter your home. Start low soaking the area just above where the leak appears in the house.

Run the water over the place where you think the leak might be located. Most roofers that install shingles will not have rubber membranes with them to do such areas. A roof valley is very prone to leaks especially if you have an older roof. If you don t want to wait for rain to look for the leak try bringing the garden hose up on the roof.

Rotten or missing trim or siding can allow water to leak behind flashing and into your roof. For example soak the downhill side of a chimney first then each side then the top on both sides. The interior walls of the dormer were often condensated and heavy rains would lead to water damage on the lower level foyer ceiling. Trying to decide if your roofs valley is leaking or some other part of your roofing is causing a leak can be tricky.

Worn out flashing or missing sealant can also cause roof leaks around dormers. Louis mo home had a leaking dormer shown above that was problematic for years. Here s a few of the defects that can cause dormers and their windows to leak. Most roofers that do shingles will use a heavy base paper instead of a rubber membrane.

Check for power lines or electrical wires attached to your roof near the dormer. Roof leaks are also very common in the winter when all the snow accumulating on a roof creates a potential for a roof leak to develop especially if a roof valley on your property is not properly flashed. If a leak is difficult to find enlist a helper and go up on the roof with a garden hose. 2 lack of flashing at top of trim over window.

There are many different types of valley leaks. Dormer leaks can be caused from a number of issues. A roof valley can be formed when two opposing sloped roof planes meet.