A roof valley is very prone to leaks especially if you have an older roof.
Roof leak dormer valley.
Run the water over the place where you think the leak might be located.
Check for power lines or electrical wires attached to your roof near the dormer.
If you don t want to wait for rain to look for the leak try bringing the garden hose up on the roof.
Most roofers that do shingles will use a heavy base paper instead of a rubber membrane.
Most shingle installers will use a thick 30 lb paper as a base for the valley.
3 deteriorated caulk around window and sill.
Louis mo home had a leaking dormer shown above that was problematic for years.
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.
This is one type of leak where experience can give a big advantage in locating and fixing the problem.
Most roofers that install shingles will not have rubber membranes with them to do such areas.
Valley areas are prone to leak due to the lack of using proper materials.
Worn out flashing or missing sealant can also cause roof leaks around dormers.
There are many different types of valley leaks.
A roof valley can be formed when two opposing sloped roof planes meet.
Rotten or missing trim or siding can allow water to leak behind flashing and into your 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.
Dormer valleys looking for roof leaks on the outside of your house.
The interior walls of the dormer were often condensated and heavy rains would lead to water damage on the lower level foyer ceiling.
Dormer leaks can be caused from a number of issues.
If a leak is difficult to find enlist a helper and go up on the roof with a garden hose.
For example soak the downhill side of a chimney first then each side then the top on both sides.
Here s a few of the defects that can cause dormers and their windows to leak.
Start low soaking the area just above where the leak appears in the house.
Even though these were previously billed as solutions for the leak a new roof and new siding did not stop the leaking.
Trying to decide if your roofs valley is leaking or some other part of your roofing is causing a leak can be tricky.
1 improperly installed or deteriorated roof to wall or roof to roof valley flashings at top back of dormer.
A roof leak at the edge of a dormer can allow a lot of water to enter your home.
