Reasons for a Roof Leak on an External Overhang

Bad Flashing

• Flashing is a waterproofing material primarily made from aluminum or galvanized steel. It is applied in areas where the roof and walls meet and is used around the chimney, along eaves and overhangs -- anywhere that leaves openings for water to come in. Problems arise when the flashing is improperly installed, damaged or has deteriorated because of age. Most often, the repair requires removing and replacing the old or damaged flashing. Most professional roofers custom cut and shape replacement pieces, or certain shapes come premade and are available from most home improvement or hardware stores. The application process varies depending on the location of the overhang and the size of the replacement.

Improper Gutter Drainage

• Gutters must be situated tightly against the eaves; otherwise, leaks are likely to occur. If the gutters are sitting snugly against the eaves and overhangs, leaks are most likely the result of improper hanging. To correctly drain, gutters must be set at an angle, approximately 1 inch for every 20 feet between downspouts, according to Repair Home. If gutters are clean but drainage still is slow, adjust the hangers to increase the slope.

Exposed Fasteners

• Improperly installed fasteners cause flashing to pull away from the roof surface, leaving gaps through which water can seep. Prevention is the best way to deal with these problems and eliminates the need for pulling up roofing and doing repairs. Nails used to hold shingles in place are prone to the same kind of problem, and must be secured tightly in order to prevent nail popping, which leaves exposed holes on the shingles and causes leaks.

Ice Dams

• Ice dams are a fairly common problem in regions that experience cold temperatures. The dam is a blockage caused by ice that prevents melting snow from draining away from the roof. If not removed, the water backs up and makes its way into the home. The dam should be removed as soon as possible to prevent serious damage and leaks that penetrate the home.