is supported by readers and may earn an affiliate commission.

Rather have a pro do it for you?

How to Install a Chimney Flashing

Step-by-Step Guide: Installing a Chimney Flashing Made Easy

Installing a chimney flashing is a crucial step in protecting your roof from water damage. Flashing is a thin, waterproof material that is installed around the base of your chimney to prevent water from seeping into your roof. In this step-by-step guide, we will walk you through the process of installing a chimney flashing.

Step 1: Prepare the area
Before you begin installing the chimney flashing, you need to prepare the area around the chimney. Remove any debris or loose material from the roof and chimney. Make sure the area is clean and dry before you begin.

Step 2: Measure and cut the flashing
Measure the length and width of your chimney base. Cut the flashing to the appropriate size, leaving an extra inch on each side. This will allow you to fold the flashing over the edges of the chimney.

Step 3: Install the base flashing
Start by installing the base flashing. Place the flashing over the chimney base and secure it in place using roofing nails. Make sure the flashing is centered and level.

Step 4: Install the step flashing
Next, install the step flashing. Cut the step flashing into smaller pieces and install them along the sides of the chimney. Make sure the step flashing overlaps the base flashing by at least 2 inches.

Step 5: Install the counter flashing
Finally, install the counter flashing. Cut the counter flashing to the appropriate size and fold it over the step flashing. Secure the counter flashing in place using roofing nails.

Step 6: Seal the flashing
Once the flashing is installed, seal all the edges and seams with roofing cement. This will prevent water from seeping into the roof.

Step 7: Inspect the flashing
After the installation is complete, inspect the flashing to ensure it is secure and level. Make any necessary adjustments if needed.

In conclusion, installing a chimney flashing is a relatively simple process that can help protect your roof from water damage. By following these steps, you can ensure that your flashing is installed correctly and will last for years to come.