A leaky roof is no joke. Luckily, we have got a metal roof flashing to save the day.

Metal roof flashing is not just a gadget; it’s a technique that stops water from crashing your home party through roof joints or penetrations.

While it comes in various materials, metal is the real MVP, offering flexibility and durability.

What is Roof Flashing?

A thin covering of roof flashing, often made of plastic or metal, is placed across roof penetrations and crossings to stop water from entering the building. 

It serves as a deflector for water, keeping it away from rooftops, openings, and fireplaces, and as a barrier against breaches and damage from water. 

For a roofing system to be long-lasting and intact, roof flashing must be placed correctly.

Purpose Of Roof Flashing

Installing roof flashing is important to a property’s roofing system to stop water from leaking into the building.


Its primary function is to divert water away from sensitive locations certain to leak, such as connections, borders, and crossings, much like the services provided by roofing contractors in Atlanta GA.

Roof flashing forms a waterproof barrier that prevents water intrusion, mold growth, and decay in the structure. This also contributes to the roof’s lifetime and stability.

Benefits Of Metal Flashing

The following are the benefits of metal flashing:

  • Metal flashing is used to give the structure stability and longevity.
  • Metal flashing increases the strength of the structure.
  • These are more resistant to severe weather
  • Used in joints to prevent leakage of water.

Common Metal Roof Flashing Types

Metal roof flashings of many different types are used in different places and for different kinds of buildings. The most prevalent flashing varieties include:

1. Step Flashing

Step roof flashing is made to fit on step rooftops, especially on chimneys, similar to the metal and shingle roof combo where it is usually constructed between the roof shingles and the nearest wall. It is made of metal, such as aluminum.

Sometimes, it is constructed at the intersections of two separate roof levels. It is like small steps, which is why step flashing is used to prevent water from flowing into the area near the wall.

This minimizes the chance of leakage. It is important to preserve a steep roof system’s lifespan and structural strength.

2. Valley Flashing

 A valley is a place where water collects and then flows down it. It is usually formed as two roof slopes join.


Valley flashing is a method used in roofing to stop water from leaking into the valley in which two roof slopes join. A key component of a metal roof system, metal roof valley flashing plays a key role in the sustainability and structural integrity of the roof.

It needs to be firmly secured, much like adding steel or silicone putty, which is usually low-cost.

3. Drip Edge Flashing

Another kind of metal flashing that is put along a roof’s edges (between the wall and roof corner)  to help divert water out of the roof and protect it from leaking into the supporting structure is called drip edge flashing.

To create an invisible gap between the roof and the building’s edge, it is usually put beneath the roofing material and over the rooftop’s edge.

As a key element of a functional roofing system, drip edge flashing is necessary for preventing water damage to the building and roof.

3. Ridge Cap Flashing

Ridge cap flashing, a type of flashing, placed along a roof’s ridge, creates a waterproof barrier and guards against water penetration.

It is intended to cover the junction of two roof slopes at the ridge and is usually composed of metal or another tough material.

Ridge cap flashing diverts water from the exposed ridge region, reducing leaks and extending roof life. Additionally, it gives the roof a clean aspect and might improve its overall appeal.

4. Chimney Flashing

The metal or other material that forms a waterproof connection between the chimney and the roof is called chimney flashing.

It is necessary to stop water from leaking into the roof and harming the building. To provide an obstruction that keeps water from flowing up the chimney and over the roof, flashing is usually put around the bottom of the chimney as well as the sides.

In addition to protecting the roof and chimney from expensive water damage, properly built chimney flashing is essential.

Specialty Metal Roof Flashing

Metal roof flashing components, built especially to fit uncommon or unusual roof designs, are referred to as specialty metal roof flashing. 

1. Eave Flashing

A roof system’s eave flashing is an essential part that keeps water out and protects the underlying structure from damage, much like the work performed by roofers in South Jersey


It is intended to divert water out of the building and toward the gutters. It is normally put along the roof’s edges, where the eaves meet the external walls.

To form a waterproof seal, eave flashing is typically put beneath roofing shingles or other materials. 

2. Wall Flashing

One of the most important parts of protecting against water penetration and structural damage is wall flashing. 

It is put in place to divert water away from the contact point and stop it from leaking into the building exterior, where a wall and a roof meet.

Wall roof flashing comes in many different types, such as step, counter, and drip edge flashing, each with a unique purpose in preventing water damage to the structure.

Factors To Consider When Choosing Metal Roof Flashing

Before selecting a metal roof flashing, one must consider multiple factors, including the roof angle, the weather of the area, and the cost and effectiveness of the selected flashing roof materials. 

1. Roof Pitch And Slope

When choosing metal roof flashing, the roof pitch and slope are important factors to consider because they affect how water will drain from the roof.

Improper pitch or an easy slope may cause water to collect and leak through the flashing. Selecting flashing appropriate for the particular pitch and slope of the roof is crucial to guarantee appropriate water drainage. 

2. Climate And Weather Conditions

It also depends significantly on the climate and weather. Variations in weather (precipitation, temperature, etc.) affect how well and how long the flashing lasts. To keep the roof safe from future damage, using a material that can endure the region’s particular environmental conditions is critical. 

3. Compatibility With Roofing Materials

It is important to consider the roofing material when selecting metal roof flashing. To establish a perfect seal and stop leaks, different types of flashing are needed for different roofing materials. To guarantee a safe and efficient installation, it’s critical to use flashing that is particularly made for roofing material.

4. Budget And Cost Considerations

Budget and financial factors must also be considered while selecting metal roof flashing. This covers the flashing’s initial purchase price and its ongoing costs, such as maintenance and future replacements. 

Metal Roof Flashing FAQ’s

What is the best roof flashing?

The best roof flashing comprises strong components like copper, aluminum, or galvanized steel. The flashing will last many years because these materials are resilient to rust and corrosion.

What is galvanized flashing used for?

A form of metal sheeting called galvanized flashing has a zinc layer applied to prevent corrosion.  Around windows, doors, and roof edges, galvanized flashing is frequently used to make a barrier against water and prevent moisture damage

Why is copper flashing used?

A thin, flexible sheet of copper called copper flashing is used on buildings to stop water from entering the building. Additionally, copper flashing is utilized to add a beautiful touch to the outside of the structure and divert water away from areas of risk like windows, doors, and chimneys.


Metal roof flashing is important to keep a building free of moisture and safe against water damage.

A metal roof flashing’s proper setup and maintenance can stop water leaks, fungus growth, and damage to the structure. 

Residents may benefit from the advantages of a strong and efficient metal roof flashing system for years by investing in excellent materials and qualified installation.