What Are Metal Flashings And What Do They Do?

By Roofing Supermarket, In Metal Flashings, 0 Comments

Leaky roofs are one thing we all dread, and something we all want to avoid. For this reason, flashing is vital to curbing this downfall and why it exists. Metal roof flashings are a device and process of keeping water from seeping through building structures at the roofing joints.

There are several materials used to make flashings, but metal is the most flexible and durable form of flashing. And as the ultimate line of defence against water, having them installed is a life-saver.

Today, we’re going to look at what metal flashings are as well as how they keep water from going through structures. Let’s take a closer look:

Metal flashings are the basis of intersectional and terminations of roofing systems and surfaces. These are designed to keep water from going through areas where there is a break in the roof.

They often come in thin pieces of waterproof material, like metal, and are installed at specific junctures of roofing systems to create a weather-resistant closing.

If you’ve ever been on the roof and looked at areas where there’s a chimney or skylights, you’ve probably come across metal flashings. There are often at the base of these areas where holes in the roof are made to install the flashing. At times, they can be extremely difficult to seal. Weather conditions can cause intersections to expand and contract due to varying temperatures and humidity, making it even more difficult to seal up.

How Does Metal Flashing Keep Water Out of Roofing Systems?

  • Gravity
  • Surface tension
  • Wind pressure

Much like shingles, metal flashing can also be installed in the same fashion, one lapping over another, or they can be sealed as a single continuous surface. For better protection against water coming through surface tension, flashings can also be rearranged with non-continuous systems.

Chimneys, skylights, and vents aren’t the only places flashings can be installed. Here’s a list of some other places you can find metal flashings:

  • Roof valleys
  • Eaves
  • Rakes
  • Ridges
  • Roof to wall intersections
  • Dormers
  • Ventilation systems

Our experts at Roofing Supermarket are well-versed in many roofing applications, devices and methods including metal flashings. If you need metal flashings for your roof, or any other areas on your property, don’t hesitate to give us a call.

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