In fact it s rare for leaks to develop in open areas of uninterrupted shingles even on older roofs.
Roof leaking by dormer.
Deteriorated caulk around window roofing leak at dormer roof roof damage from falling branch or hail.
Items that penetrate the roof are by far the most common source of leaks.
Penetrations can include plumbing and roof vents chimneys dormers or anything else that projects through the roof.
Roof nail leaks can happen when roof nails have been loosened slightly from high winds or have simply pulled out over time.
Boots the rubber seals that are around the electric service and plumbing vent pipes air vents and exhaust fan.
If shingles get lifted or torn from high winds the damaged shingle exposes nails holding the shingle below it.
Ridge cap flashing gaskets around pipes.
Examine the trim and siding around the dormer.
Look along the edge of the dormer siding where it meets the shingles.
Dormer roofs are often made of a cheaper less durable substance than the rest of the roof.
The heavy snows and ice of winter 2013 14 compounded the problem when ice damming on the roof backed up into the dormer and poured through to the foyer ceiling creating the situation shown above.
Lack of flashing at top of trim over window.
Most dormer leaks occur as the flashing deteriorates and the connection between the two roofs is weakened leading to.
Finding the leak 1.
Here s a few of the defects that can cause dormers and their windows to leak.
Look for signs of rotting or a missing piece of siding.
The interior walls of the dormer were often condensated and heavy rains would lead to water damage on the lower level foyer ceiling.
And just one rusted out nail can cause your roof to leak every time it rains.
Improperly installed or deteriorated roof to wall flashings.
These nails will eventually rust.
Even though these were previously billed as solutions for the leak a new roof and new siding did not stop the leaking.