Roof Flashing, What is it?

Roof flashing refers to the materials used on roofs to prevent water leaks. Certain areas on roofs may be more susceptible to water damage.

roof flashing

These areas may include dormers, skylight parameters, and chimneys. Any area where water runoff is heavy will need roof flashing.


There are several different types of materials used in roof flashing. The most common include galvanized steel, aluminum, and copper. Occasionally materials like rubber, plastic, and roofing felt may be used.

Roof Flashing Types:

There are certain types of flashing that are different on different roofs. We’ll explain them below.

Chimney Flashing

Chimney flashing uses several different flashing methods. It utilizes step flashing around the sides and saddle flashing on the top. Cap flashing is often used on parts that overlap to make sure no water can get in.

Step Flashing

Step flashing is used in areas where a sloped roof meets a vertical wall. You will often see this type of flashing on the sides of chimneys and dormers.

Drip Edge

Drip edge refers to the type of flashing used along the bottom edge of the roof. This keeps the water flowing down and off the roof.

Saddle Flashing

Saddle flashing is a type of flashing that is used on gabled areas that need sealing. Like a saddle, the flashing sits on top of a gable and seals the top and sides. You would typically see this on the side of a chimney.

Pipe Flashing

As the name implies, pipe flashing is used to seal the area around pipes that may be sticking out of the roof. This type of flashing is usually cone-shaped with a flanged base. The base is secured under the shingles for a tight seal.

Flashing helps secure all areas on your roof that are vulnerable to water leaks. These areas need to be inspected regularly for damage. If damage such as cracking, tearing, or warping is apparent, call your local roofing company to come and do an inspection. Early intervention with these problems can help save thousands of dollars in costly water damage to your home.