How to Find — and Repair — Chimney Roof Leaks

Leaks around fireplace chimneys are common and can be hard to identify the source. Chimney roof leaks are usually caused by gaps or cracks between the metal flashing used to join the chimney to the roof and the chimney.

To repair chimney flashing leaks:

  1. Inspect the flashing for gaps or cracks.
  2. Apply roof cement to any gaps or cracks.
  3. Attach loose flashing securely to the chimney with masonry nails.

Watch this video to find out more.

Further Information

Danny Lipford: Barry asks, “We have a leak somewhere around our chimney but can’t seem to locate it. Any suggestions?”

Finding a leak on your chimney can be one of the most frustrating things you’ll ever do at your house, because there’s so many entry points.

But the vast majority of the time, the problem is with the flashing—the metal material that’s right around the base of your chimney that kind of integrates into your roofing, whether it’s shingles or other types. That’s where, a lot of times, the flashing will pull away a little bit, and you’ll have an entry point for that rain.

What you need to do is reattach the flashing anywhere you see any gap or crack, using nails or screws. Then grab a good quality exterior caulk and seal every little crack you can possibly find.

Also, a great idea is to dab a little on the nail heads or screw heads to make sure that rain doesn’t enter the house.