Roof flashing leaks are one of the most common causes of roof-related water intrusion. Flashing is installed at roof transitions and penetrations to direct water away from vulnerable areas. When flashing is missing, damaged, or improperly installed, water can enter the roofing system and cause interior leaks.
Flashing leaks are often misdiagnosed as shingle or roof surface failures. In many cases, the roofing material itself is intact, but water is entering at joints, walls, chimneys, skylights, or roof-to-wall transitions where flashing has failed.
How Storm Damage Affects Roof Flashing
Roof flashing is especially vulnerable during storms. High winds, heavy rain, hail, and debris can loosen, bend, or displace flashing materials. Once flashing is compromised, water can bypass the roofing system and enter the structure.
- High winds: Strong winds can tear or lift the flashing away from the roof.
- Heavy rain: Heavy rain can saturate the flashing and cause it to leak.
- Hail: Hail can damage the flashing by denting it or breaking it.
- Debris: Debris from storms, such as tree limbs or shingles, can damage the flashing.
When the flashing is damaged, it can cause water leaks into the home. The water can leak into the attic, the walls, or even the foundation. If the water leaks are not repaired, they can cause serious damage to the home.
It is important to inspect the flashing after a storm to see if it has been damaged. If the flashing is damaged, it should be repaired as soon as possible.
Common Roof Flashing Leak Repairs
Roof flashing leaks are commonly caused by missing or improperly installed flashing components. One frequent issue is missing or incorrect kickout flashing, which allows water to run behind siding instead of being directed into the gutter system.
Step flashing failures are another common source of leaks, especially where flashing was not installed correctly during construction. In these cases, shingles and siding may need to be carefully removed so flashing can be repaired or replaced properly.
Dormers and roof-to-wall transitions are also frequent problem areas. Proper flashing at these intersections is critical to prevent water from entering wall cavities and interior spaces.
Real Roof Flashing Leak Case Studies
Roof flashing leaks are often caused by improper installation, missing components, or shortcuts taken during original construction or past repairs. In many cases, the roof surface itself is not the problem. Below are real-world examples of flashing-related leaks we diagnosed and permanently repaired after other contractors failed to identify the true source.
If you suspect a flashing-related leak, a proper inspection is critical before any repairs are made.
For complete roof leak diagnosis and repair services, visit our Roof Leak Detection & Repair page.