South MS: (601) 520-3183

North MS: (662) 636-7663

North AL: (256) 692-5527

Do You Need To File An Insurance Claim

Learn How Our Insurance Experts Can Help

Your Guide To Different Types of Roof Flashing

Posted on May 30, 2024

Roof Flashing Types

Roof flashing is an integral component of a roofing system. They add to the overall strength of the roof and protect against water penetration and leaks. Installed around gaps in roof penetrations such as chimneys, and other vulnerable areas on the roof, different types of flashing direct water away from the roof and channel it towards the drainage system. 

If you are installing a new roof or replacing the old roofing material, professional roofers will recommend installing different types of roof flashing depending on the location on your roof. In this detailed guide, we will explore types of roof flashings with pictures. Read it to make an informed decision for your roof’s protection. 

What Is Roof Flashing On A Roof?

Roof Flashing On A Roof
Roof Flashing

Roof flashing is a thin metal or rubber component installed along intersections, and other critical areas on the roof. Its main purpose is to prevent water infiltration around chimneys, roof-to-wall intersections, skylights, vents, or any vulnerable areas where water can infiltrate the roofing structure. 

It’s mainly made of metal such as galvanized steel, or plastic, aluminum, or rubber. Different types of roof flashing are installed on the roof to preserve and maintain its integrity and protect against water infiltration. The most common types of roof flashing include step flashing, counter flashing, and apron flashing. 

How Does Roof Flashing Work?

Roof flashing plays a crucial role in preventing leaks by being integrated with the roofing materials. This typically means overlapping layers of flashing to effectively direct water away from vulnerable areas. Flashing is often strategically installed to mimic the shingle pattern of the roof, helping water flow downward. And since it’s generally made of flexible metal or rubber, it can easily expand and contract with temperature changes without compromising its watertight seal. 

Different Types of Roof Flashing For Your Home

1. Step Flashing

Step flashing is installed where the roof meets a vertical surface like a chimney or dormer wall. It’s installed in an overlapping stair-step pattern, with each piece covering the horizontal and vertical joints. This configuration allows water to flow smoothly down the roof and prevents it from seeping behind the roofing material and vertical structure. However, the step flashing must be installed correctly, with the correct lap lengths and the proper integration into the roofing system and siding/masonry components, which is crucial for ensuring its effectiveness.

2. Counter Flashing

While the purpose of counter flashing is the same as that of step flashings: to prevent water infiltration around chimneys and roof-to-wall intersections, they are installed along the top edge of vertical surfaces. Counter flashing is simply a complementary component to step flashing with its primary function being to cover the top edges of the step flashing pieces, creating an additional barrier against water infiltration. 

3. Drip Edge Flashing

Drip Edge Flashing
Drip Edge Flashing

True to its name, drip edge flashing is installed along the edges of the roof to direct water away from the fascia and into the gutter system. It helps prevent water from seeping underneath the roofing material, reducing the risk of rot and water damage. 

4. Vent Pipe Boots/Flashings

Vent Pipe Boots/Flashings
Vent Pipe Boots

The area around vent pipe boots needs to be covered since the vents create a hole in the roof’s surface, which can allow water to enter the roofing system. The flashing around these pipes is known as the boot and it’s made of a cone-shaped cover with a flexible collar that fits tightly around the pipe. However, one thing to keep in mind is that proper sizing and installation of boots are critical to avoid leaks around these penetrations.

5. Apron Flashing

Apron flashing is installed at the joint where a roof meets a vertical wall or a dormer. It helps prevent water from seeping into the gap between the roof and the wall, reducing the risk of leaks. Creating a waterproof transition around any roof-to-wall connection, this type of flashing prevents water intrusion around critical areas. 

6. Chimney Flashing

Chimney Flashing
Chimney Flashing

Chimneys require specialized flashing systems to weatherproof the wide structure as it penetrates a large portion of the roof’s surface. Chimney flashing is used to seal the gap between the chimney and the roof, and typically consists of both base and counter flashing to provide comprehensive protection against water intrusion.

7. Roof Valley Flashing

Roof Valley Flashing
Roof Valley Flashing

Roof valleys are crucial parts of a roofing system, and form when two roof planes meet. While they can add to the appearance of your roof, their purpose is to protect and enhance the longevity of your roofing system by directing and channeling water to the drainage system. Without them, water would pool on the surface of your roof and seep under the roofing material, causing damage. 

There are also different types of roof valleys, and each one requires a different type of valley flashing. This flashing typically consists of a long, narrow metal or rubber strip installed along the center of the valley to protect it against water intrusion. 

Which Roof Flashing Material Is The Best?

When it comes to choosing the right material for your roof flashing, several options are available, each with its own set of advantages and considerations. Common materials include:

Galvanized Steel: Affordable and durable, galvanized steel flashing is resistant to corrosion and can withstand harsh weather conditions.

Aluminum: Lightweight and rust-resistant, aluminum flashing is easy to work with and offers excellent moldability for custom installations.

Copper: Known for its longevity and aesthetic appeal, copper flashing develops a natural patina over time, adding character to your roof.

PVC: PVC flashing is a cost-effective option that provides reliable waterproofing for roof penetrations and edges.

Rubber: Rubber flashing, often made from EPDM (ethylene propylene diene monomer), offers flexibility and weather resistance, making it ideal for curved or irregular surfaces.

To choose the best roof flashing material for your home, consider your roofing materials, your home’s specific needs, and the design of your roof. It’s also best to consult a roofing professional to help you make a decision tailored to your roof’s specific needs. 

Should You Replace Roof Flashing Before A Roof Replacement? 

If you’re planning a full roof replacement, it’s highly recommended to replace all the roof flashing at the same time. Old, worn-out, or deteriorated flashing can quickly compromise the performance of your new roof, leading to leaks and water damage down the line. By replacing the flashing along with your roofing material, you’ll be ensuring your whole roofing system is brand new and working optimally together to protect your home. 

If you’re not replacing your roof in the near future, but your flashing has deteriorated beyond repair, then you need to act quickly and replace the flashing on your roof with new ones. 


Roof flashing may not be the most visible aspect of your home’s exterior, but it plays a crucial role in protecting your investment and ensuring the longevity of your roof. By understanding the different types of roof flashing available and choosing the right materials for your specific needs, you can safeguard your home against water damage and enjoy peace of mind for years to come. 

Contact B&A Roofing In Hattiesburg For Your Roof Flashing Services

Roof flashing is an essential component of a roofing system that can’t be ignored, which means replacing and repairing it when it’s damaged. In order to ensure that the proper installation and repair methods are carried out when it comes to flashing around chimneys, valleys, and other areas on your roof, you’ll want to consult a roofing professional for your needs. 
Contact B&A Roofing In Hattiesburg for your roof flashing needs. Our skilled roofers don’t just roofing services, but exterior ones as well to ensure your entire home is protected.  Regardless if you need a new roof installation, roof replacement, or a simple repair, our team of experts is ready to help. Contact us today at (601) 520-3183 to find out what we can do for you!

Don’t see your location? Call us! We Likelt serve your area too