If you have a masonry chimney, you most likely have a chimney crown at the very top. This essential chimney component covers the opening of the chimney to keep water from entering your home. Because the chimney crown is directly exposed to the elements, it can suffer from erosion damage and deteriorate. When your chimney crown is cracked and damaged, it cannot properly do its job.
According to the Chimney Safety Institute of America (CSIA), water can do a lot of expensive damage to a masonry chimney and a home. You should be sure your chimney crown is in good condition. Aelite Chimney Specialties provides chimney crown repair and construction services to residents in the Chicago area. We would like to tell you a bit more about what we do to protect your chimney and home from water penetration.
Sealing off the chimney from the flue liner to the chimney’s edge, the crown should be built with a downward slope so that water will be directed away from the flue. That makes the water run off the edge of the chimney. There should also be an overhanging drip edge that will help to prevent erosion damage to the bricks and mortar of the chimney.
What is a common mistake made when constructing chimney crowns?
Over our years of working on chimneys, Aelite Chimney Specialties has seen some poorly built chimney crowns. The most common mistake we have seen is a crown with an inadequate drip edge. When we construct chimney crowns, we always make sure each crown has the required two-inch overhang that projects beyond each side of the chimney. We also ensure that the flue liner tile also projects at least two inches above the crown.
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What kind of mortar does Aelite Chimney Specialties use when constructing chimney crowns?
You can trust us to always use a Portland cement-based mixture when we build and repair chimney crowns. Another mistake we often see is chimney crowns made from a mortar mix that is not as durable as a Portland cement-based mixture. The Portland cement mixture can withstand years of exposure to water without chipping, cracking, or deteriorating.
If you cannot remember the last time your chimney crown has been checked out, contact us at Aelite Chimney Specialties. We can make you an appointment for a chimney inspection. We can repair any cracks your crown may have, and if your crown is beyond repairing, we can construct and install a new one to protect your chimney from water penetration.