What Is Metal Roof Chimney Flashing?

Do you like placing a bucket in the center of the living room to collect the water droplets coming from the roof? Of course not! Nobody likes that, and a leaky roof is a terrible thing. But the good news is that something like metal roof chimney flashing exists! Metal roof flashing is a way to stop rain or melted ice water from entering the structure of your roof from joints. You can make a flashing out of several different materials, but the most widely used is metal flashing due to its flexibility and durability.

So, What is Flashing? 

The structure of your roof, especially around the chimneys, is not even or continuous. Therefore, water can easily penetrate through theses opening, and the leakage can damage your interior. Flashing is thin sheets of impervious material such as metal. They make your roofing system more resistant to weather.

There are three ways by which the flashing keeps the water away from roof gaps, such as:

  • Wind pressure
  • Gravity
  • Surface tension

There are two ways to install the flashing. You can either install the flashing in the form of shingles where one piece overlaps the other. Or you can seal them in which it acts as one continuous surface.

Other than using flashing for chimneys, vents, and skylights, you can also install it in:

  • Eaves
  • Rakes
  • Dormers
  • Roof Valleys
  • Ridges


Other than metal, flashing can also be made from different materials such as plastic or rubberized asphalt. It can be concealed or exposed. These metals are usually used for flashing such as:

  • Lead
  • Copper
  • Lead-coated copper
  • Stainless steel
  • Zinc
  • Aluminum

The different types of flashing are:

  • Channel flashing
  • Valley flashing
  • Roof flashing
  • Pipe flashing

If you still have any questions regarding metal roof chimney flashing, you can call Fort Bend Steel Supply at 281-499-5800 or visit our office in person.

Skip to content