The flashing around your chimney is perhaps the most vulnerable and vital part of the chimney. That is, when the flashing goes, your chimney really becomes vulnerable. Flashing is installed at the corners where the roof meets the chimney. Pitched roofs need flashing to be strong, especially on the top side. The roof angle where it meets the chimney can cause water pooling. If water is allowed to rest on the flashing for long periods of time, it could wear down the flashing adhesive and eventually lead to leaking. Once water gets inside your chimney walls, it becomes an expensive and inconvenient thing to fix.

This article shows how you can repair your flashing to maintain a watertight seal. This is key to preventing serious damage to your chimney. If you are already noticing water leaking inside your chimney, you should stop right there and call in the pros from a company like Excel Chimney & Fireplace Service. At this point, fixing the flashing will probably not really solve the problem. This is why it is so important to check your flashing and repair it as a preventative measure.

Check Your Flashing

First of all, you need to check the state of your flashing. This means you need to physically get on the roof and look at it up close. If any of the edge seem to be peeling up, or if the flashing feels loose, you might have a problem that you can fix. If the flashing is loose enough, you should just try to remove it completely and replace it with a new piece.

Fixing or Replacing the Flashing

If the flashing seems like it is just barely starting to peel up along the edges, you can simply fix it with waterproof, construction-grade adhesive caulk. The key is to apply caulk underneath the flashing and then weigh it down with bricks, and let it dry for a couple of hours. This can be difficult if you have a steep roof pitch, but the bricks can usually rest on the chimney so they don't slide down. Then, caulk the outside of the seams to create a watertight seal.

If you need to replace your flashing completely, you can do it easily if you buy a new flashing piece that is slightly wider than the old piece. This way the seams will not be in the same place that they were, and you will fully cover the old adhesive markings. Installing flashing is easy because you just glue it down and then caulk the seams (just like you do when repairing lifted edges).

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