Flashing is one of the most important parts of roofing systems. It serves as a weather-resistant barrier and prevents water from leaking into the roof structure. Flashing comes in thin pieces that are attached to the roof and will need to be replaced from time to time to maintain water protection. When it comes time to replace your flashing, there are several options, so you need to know about each type before you make your decision.

Types of Roof Flashing

Before you choose a flashing material, it is best to understand what flashing is. Flashing is installed:

  • Close to chimneys
  • Next to pipes
  • In wall construction
  • In joints
  • Around valleys
  • Near skylights

What Does Roof Flashing Do?

Flashing is designed to keep water from seeping into the roofing structure. Flashing will be installed anywhere on the roof where water may pool or leaks are more prone. Where the roof surface intersects the wall or any vertical structure is commonplace to find flashing. It makes sure any water runs down the sides of the building and not into the roof deck.
The type of flashing you want will depend on the shape and structure of your roof.

  • Chimney Flashing: You will find this around the chimney to prevent water from getting into the chimney which can weaken its structure. Base flashing is used along the bottom of the chimney and cap flashing goes around the top, both working to direct water away from the chimney by a pipe.
  • Continuous Flashing: This is installed where a vertical wall meets a sloped roof. This flashing resembles a long metal piece that directs water down the roof. You need to have expansion joints to accommodate any expansion or contraction that occurs during weather changes.
  • Drip Edges: These are thin metal pieces that are installed along the roof edge to protect from leaks. Water spills over them protecting the eaves and rakes.
  • Valley Flashing: This is installed around the valley to move water towards a gutter. These are mostly metal and are used to protect the most critical areas of the roof.
  • Vent Pipe Flashing: Leaks are common around vent pipes because pipes penetrate through the roof. This type of flashing protects these areas and moves water away towards the shingles.
  • Step Flashing: Step flashing consists of several metal sheets that are bent at 90-degree angles in the center. This rectangular shape created is ideal for protecting chimneys and dromers. Step flashing is installed in layers from roof to wall and pushes water away from the walls

Final thoughts

Flashing is one of the best ways to prevent leaks in your roof, but proper installation is important. You need the right type of flashing and the right installation for the best protection of your roof and building. We are here to help with all your roofing and flashing needs, so reach out to us and get your roof protected today.

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