Look along the edge of the dormer siding where it meets the shingles.
Fix roof around dormer.
Dormer roofs are often made of a cheaper less durable substance than the rest of the roof.
Examine the trim and siding around the dormer.
Check the flashing beneath the corner trims along.
Most dormer leaks occur as the flashing deteriorates and the connection between the two roofs is weakened leading to leaks which may cause mould stains and damage within the walls of the house.
Here are some tools you ll find useful.
About diy roof repair.
Look for signs of rotting or a missing piece of siding.
Mosby installed an ice and water shield at the roof transition from the front porch and along the roof gutter line.
A flat dormer has a flat non sloping roof.
Use a flashlight to ensure the flashing extends.
An inset dormer as opposed to other dormers which extend out from the roof is set back into the roof leaving a flat horizontal space between the bottom of the dormer and the rest of the roof.
For flashing around dormers scrape out the old caulking compound if any and brush the flashing with a wire brush.
Start low soaking the area just above where the leak appears in the house.
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.
Isolate areas when you run the hose.
Apply urethane roofing cement between the siding or shingles and the flashing.
Finding the leak 1.
A shed dormer has a roof with a single sloping plane usually at a shallower angle than the main roof.
Be sure to seal any obvious seams.