Your chimney crown sits at the top of the chimney. If you are questioning what it looks like, just step outside, look up, and you’ll see it. The crown is the cement structure that is built onto the top of your chimney. Some chimneys have a smaller, added on ‘roof’ over the opening of the chimney; this is the chimney cap. Both the chimney cap and the crown are there to protect your chimney from water damage but work differently. The chimney cap is designed to cover the actual opening into your chimney. The chimney crown works a bit differently but is just as important for the protection of your chimney.

The Function of a Chimney Crown

masonry chimney with blue skyA chimney crown is designed in a special way to help protect your chimney from precipitation. It has sloped sides so that when it rains, sleets, or snows, the precipitation flows away from the opening of the chimney and towards the edge of the roof rather than into the chimney. One area that is especially susceptible to leaking is the place where the roof and chimney meet. The crown is built to stick over the edge of the chimney by at least two inches, so the rain falls farther out on the roof and away from this junction.

What Makes a Good Chimney Crown?

Because of the important role a chimney crown plays, it’s important that it is in good shape. One problem that occurs in regards to the chimney crown can start at the construction of it. A chimney crown should be made of cement, but many contractors get around this by using the mortar. This makes a chimney crown that can’t hold up to the wear and tear of weathering. Although this shortcut can save money at the start, it can also cause problems later on including damage to the walls and ceiling of your home, cracked chimney liner, or even instability of the chimney structure.

If you’re having problems with chimney leaks, the first thing you’ll want to check is your chimney crown. Give SirVent Chimney and Venting Service a call if you suspect there’s a problem. If you notice there are stains on the ceiling near your fireplace or the wallboards are weak or peeling, or if you notice that metal parts of the fireplace system are rusted, these are signs of a problem.

We’ll do a thorough inspection, which includes a close look at the chimney crown. Our CSIA certified professionals have the training and the equipment to do any repairs necessary for your chimney crown or other parts of your chimney and fireplace. Warm weather is the best time to have these repairs done, so give us a call soon and we can get started!