Chimney and Vent Repair
An improperly installed or damaged chimney flashing can quickly lead to leaking.
Leaks can occur in several ways. Rarely will a roof have a hole from outside, directly to the inside that you could see through. Instead, water is seeping into any loose seams and finding channels where it may start to drip on the inside.
A more common reason for a leak is due to fixtures on the roof. Fixtures include chimneys, vents, and other objects that protrude through or on top of the roof. — Because these items are built with the idea that a hole is needed is the roof for the fixture, then material is put around that hole to prevent water from building up and leaking through. That surrounding material is usually metal, called flashing or an apron. It can wear out, or may be improperly installed. Over time, the seams where the metal is connected to the roof or the fixture is can allow precipitation in.
Chimneys are one of the more common reasons for leaks. There are lots of design nuances to a normal chimney.
A professional roofer won’t cut corners to properly seal and flash around a chimney. Their goal is to eliminate all possible leaks. But time takes a toll on all fixtures.
Therefore, regular inspections make it a point to check for how well these areas are sealed. A pro will thoroughly check for leaks, but a basic inspection can be done by anyone.
Corrosion or cracking in the flashing could results in leaks that are perhaps nowhere near the chimney. Assuming the chimney itself is fine, and the leak is due to the flashing, this is a moderate repair
If the chimney needs work as well, this could then be a major repair depending on size of the chimney and extent of leaks elsewhere on the roof.
Improperly sealed vents, pipes, and fans
We have seen this all to often.
Any roof penetrations, including plumbing vents, roof vents, and fans present direct opportunities for leaks. Plumbing vents and pop-in roof vents are the most common problem areas, and unfortunately, on a lot of re-roofs, very little effort is paid to these other than cutting the shingles around them—usually quickly, while running shingle courses. A good quality boot should be used on all protrusions and is a good way to avoid problems in the future.