Chimney Leak?

Many Chimney Leaks are from Cracks in the Chimney Crown


The chimney crown or splay is the cement part on top of the chimney*. The bricks go up around the tile flue liners, but at the top you need something to stop the rain and snow from just falling in around the tiles. You can see that the very purpose of the chimney crown is to keep rain out. Cracks in the chimney crown can occur from shifting of the structure or from shrinkage dating back to the first day the crown was put on. When your crown has cracks, the water goes right through those cracks.

How to fix a cracked crown depends upon how bad the damage is. Most crowns have small cracks. Even small ones need to be fixed because all big cracks started out as small ones. Water freezes and thaws in the cracks all winter long, year after year, forcing small cracks to eventually become big cracks. There are excellent crown coating materials such as Chimney Saver Crown Coat which cover the masonry and prevent small cracks from becoming a real problem.

Once chimney crown damage is significant, though, the only fix it is to remove and relay the masonry. You can’t put a crown coat on a structurally ruined chimney and expect it to work effectively or for a long time. Best to coat your crown now with Crown Coat and avoid the big hassle and expense later.


*Commonly both chimney crowns and chimney splays are referred to as crowns, although very real design differences exist between them, not discussed here. In these images this client’s chimney has a splay. These images were taken of a client’s chimney in Littleton, CO Sept 2014.

Leaky Chimney? We can fix that! If you believe that your chimney is causing damage to your home please give us a call or schedule an appointment online. We’ll be happy to help you.

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