Does Roof Flashing Need to Be Sealed?

November 12, 2024

Roof flashing must be sealed to waterproof your roof, preventing leaks and other expensive repair needs. This thin, sturdy metal is designed to protect vulnerable areas of your roof, such as valleys, chimneys and edges. 

Kickout Flashing by PBZ can help you discover what roof sealant and flashing you need to keep your home in top shape.

How Do You Seal Roof Flashing?

Whether replacing damaged flashing or installing it from scratch, you must take your time at each step. Properly sealing roof flashing will ensure it will last and prevent costly damage.

Here are the steps and additional tips for a successful seal.

1. Gather the Necessary Tools

You will need several tools to ensure your flashing is installed and sealed correctly. Having these tools and gadgets can make the process much easier:

  • A wire brush to remove dust and debris for the sealant to adhere.
  • A scraper can quickly remove excess dried sealant and debris.
  • A caulking gun will make sealant application smooth.
  • A putty knife will help evenly spread roofing cement and sealant.
  • Needed safety gear includes gloves, eyewear and a sturdy ladder.

2. Inspect Your Roof

Check the roof and the area around the installation site. You will need to repair any of the following issues before you install and seal the flashing:

  • Rust spots
  • Cracks and gaps
  • Loose flashing sections
  • Debris accumulation, including dust, leaves or sticks

3. Clean the Surface

Flashing and sealant will need a clean surface to bond fully. Remove large debris from the area, including leaves, dirt, sticks and other items that could have built up over time. You will then need to scrub the flashing with a wire brush to remove anything you cannot easily sweep away. 

Finally, rinse the area with water and allow it to dry completely. Any leftover moisture and debris will weaken the sealant and can lead to leaks.

4. Install the Flashing

Place the new flashing according to the manufacturer’s directions. If replacing damaged flashing, ensure the new one is layered over the old one. This placement will create a barrier against water and potential leaks.

5. Apply the Sealant

Choosing your sealant is the first step to a successful seal. Roofing cement and silicone caulk are the most common options to fill the gaps and cracks in the flashing. High-quality silicone caulk often provides a long-lasting, water-resistant result.

When applying the sealant with a caulking gun, be sure to fill all the cracks, gaps and openings with a watertight seal. Use the putty knife to smooth out the sealant for proper adhesion and enhanced installation appearance.

Contact Our Experts Today

Kickout Flashing by PBZ offers durable solutions to protect roofs from water leaks and inclement weather. As with other forms of flashing, kickout flashing will need to be sealed. Our experts are here to provide high-quality products that meet your property’s needs, depending on materials, finishes and colors.

Contact us today to learn more about how we can best serve you.

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