As your roof ages or sustains weather damage, certain areas can become susceptible to leaks. Keep an eye out for problems and take preventive measures to fix them so as to avoid serious structural damage or mold or mildew growth.
Here are some of the ways water starts seeps in:
Leaks at joints: Joints between the roof and the chimney or between two sloped sections of a roof are highly susceptible to leaking.
Broken or cracked shingles: Water can seep through the roof and into your home if your roof has cracked or broken shingles. Shingles usually deteriorate on the southern face of the roof first because of exposure to sun.
Leaks along flashing: Roofers use flashing, which refers to various waterproof materials, wherever something sticks up through the roof line — such as a chimney or vent stacks. Flashing is important to protect against leaks in these areas.
Over the years, however, these can become weak spots where rain begins to find its way under the shingles. Caught early enough, a small gap can be resealed. Left alone, it could become a major leak requiring repairs all the way down to the rafters.
Even a small leak that doesn't yet reach living quarters can result in wood rot and mold growth. When mold takes root inside a home, it can cause serious health problems. Look for leaks as a normal part of roof maintenance.
When inspecting for leaks inside your attic, look for dark streaks on the boards that form the underside of the roof frame.