How To Repair and Install Chimney Flashing

Are you ready to get started with your repairs? These steps will help you get flashing that lasts.

1) Get Rid of the Old Flashing

To make room for the new flashing, the first step is to take out the existing flashing. A pry bar should allow you to remove the flashing. You can use the same prybar to remove any roofing cement leftovers so you can begin with a clean surface.

2) Measure Your Roof Slope

Before you start installing your roof, measure the slope. This can be done by placing a piece of scrap plywood on your roof and measuring the run as well as the rise using your level. To determine your slope, connect these two lines and measure how long the “rise” line is.

3) Make a New Flashing

After you have determined the roof slope, it’s time to cut the flashing. For a quick installation, we like to ensure that the base flashing and the step flashing are properly cut.

4) Attach a New Flashing

Then, attach the base flashing onto the chimney. The base flashing should be snugly fitted against the chimney without gaps. Attach the base flashing using a few roofing nails. Next, attach your step flashing. To secure the step flashing, you can apply a small amount of caulk before nailing it down. Finally, install the chimney saddle. It should be pre-bent so it fits around your chimney.

5) Install Cap Flashing

Cap flashing is the last type of flashing that you’ll install. You will need to cut a groove in the mortar joints of your fireplace to install cap flashing. To protect the flashing from being damaged, use a hammer to drive the cap flashing’s flange into the mortar joints. Then, secure them with a masonry anchor or a nail.

6) Seal with Caulk

Finally, seal the cap by caulking the edges. This will ensure that your chimney is dry.

This post was written by a roofing specialist at All Star Roofing. We offer the best roof repairs in Tampa. We are a family-owned and operated roofing business, striving to be the best in our industry. Our family has been in the Tampa Bay area for over 60 years, and our objective has always been to provide roofing services at a fast, reliable, and competitive rate. All Star has a tradition of quality workmanship, servicing residential and commercial properties.


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