Here is some information that might help you after the storms this week.
Causes of Leaks:
- Defective flashing. Wet spots near a chimney or outside wall may mean the leak is caused by defective flashing, narrow flashing or loose mortar joints.
- On sloping roof valleys and at junctions of dormers and roof, look for corroded, loose or displaced flashing. Defective flashing often occurs around dormers and plumbing vent pipes.
- Clogged downspouts or eaves. Check for choked downspouts on flat roofs. Accumulated water on the roof above the flashing may cause a leak.
- Cracks and deterioration. Roofing (especially wood or composition shingles) usually deteriorates first on southern exposures. Check southern slopes for cracking or deterioration.
- Holes. Wet spots on plain roofs usually are caused by missing shingles or holes in the roofing. To find holes, look for light coming through places in unsealed attics. Stick a straw through the hole to mark the spot on the outside.
Methods of repair will depend on the kind of roofing and the nature and extent of the leak.