Types of Roof Flashing


If you’re looking into roof repairs or replacement, you’ve probably heard about roof flashing. It’s a relatively unknown, but extremely important, part of your roof. In fact, there are many types of roof flashing, all with their own unique purpose.

What Is Roof Flashing? What Do Flashings Do?

Roof flashing consists of thin metal sheets or other waterproof materials which are used to redirect water away from important parts of your roof – the vents, gutters, and any points in the roof where the roof meets the walls. Flashing is incredibly important to your roof’s functional integrity and is a necessary part of all roofs.

Is Roof Flashing Necessary?

Yes, roof flashing is essential for maintaining the functional integrity of your roof. Flashing is required by code to be included in the roof because of how important it is.

Does Flashing Go Over or Under Shingles?

Whether or not flashing goes over or under shingles depends on the type of flashing. There are many different kinds. To learn more about the different types of flashing, read below.

What Are the Different Kinds of Roof Flashing?

There are many different kinds of roof flashing, and all of them are vitally important to keeping your roof safe and healthy. A few of the types of flashing are:

  • Drip Edge Flashing: This type of flashing is found along the eaves, and/or rakes (edges) and reduces moisture damage to wood fascia, trim, and overhangs.
  • Valley Flashing: Valley flashing goes on the valleys of the roof, where two sections of the roof meet and create an angled dip. This flashing is installed on top of the underlayment and under the shingles or tiles. Valley flashing is among the most important kinds because roof valleys are most at risk of leaks and erosion if flashing is not properly installed. Some asphalt shingle roofs have a heavy waterproof type of underlayment under the shingles that takes the place of metal valley flashing.
  • Step  Flashing: This flashing goes on the sides of roof penetrations such as chimneys and skylights, or along the sidewall of two-story areas.  Its purpose is to keep stormwater from entering under the roofing at these points.
  • Vent Pipe Flashing: This is a special type of flashing that’s installed tightly around pipes that come up from the roof.

These are only some of the different kinds of roof flashing. It may seem complicated, but don’t worry – our roofers know exactly what they’re doing and will answer any questions you have about your roof.

What Is the Most Common Material Used for Roof Flashing?

The most common materials used for roof flashing are galvanized steel, aluminum,  lead, and copper. These are all excellent, time-tested choices that provide the expected results, but other materials can be used instead.

We hope that this blog answered all the questions you have about roof flashing, but if you have more, don’t hesitate to ask us – we’ll always tell you the truth about your roof. Call us now at (480)-426-1915 to schedule a repair or replacement, or just to ask questions.

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