A chimney crown is an essential part to the chimney because it acts as a shield and first line of defense against weather-related deterioration. The crown is built on top of the chimney and designed so water can easily run off, instead of collecting on top. Water can eventually cause the chimney to deteriorate, since it is a natural solvent. The crown acts in reducing water damage and lengthens your chimney’s life. However, crowns do not last forever and need to be repaired or replaced once they start to crack or deteriorate.
CrownCoat from SaverSystems on Vimeo.
Broken Crowns
A broken crown can cause water to leak in and create major damage to a home. Most cases , chimney damage happens top down, as the crown develops cracking and water gets in and freeze and expands causing more and more damage as time goes by. The chimneys here in Connecticut experience even more rapid deterioration from numerous freeze-thaw cycles due to the northeastern weather patterns. It is important to catch these problems before they accumulate because once the crown goes, the rest of the chimney is sure to follow. Bricks can loosen up and if this isn’t repaired soon, rebuilding the chimney would be the only solution. If the crown or brick isn’t in bad shape, we recommend CrownCoat. This is a coating that acts as natural concrete to be used on your chimney, or wherever a flexible waterproof membrane is needed.
Rebuilding the Chimney Crown
Rebuilding the Chimney Crown In cases where the chimney crown is too far deteriorated to simply seal, rebuilding it may be necessary. A little more labor is involved when tearing down the cement crown and building a new one. Sometimes staging or a platform must be installed in order to do the demolition and rebuilding. A new crown can be up to a hundred or more lbs of masonry. This is something SafeSide Chimney specializes in.
How Long Does a Concrete Chimney Crown Last?
When properly constructed and maintained, a concrete chimney crown can provide decades of protection for your chimney. Many concrete crowns last 40–60 years before significant repair or replacement is necessary, thanks to improvements in concrete formulation and installation methods over the past several decades. However, actual lifespan depends on factors such as quality of materials, craftsmanship, and exposure to harsh weather.
Routine inspections and timely maintenance—like sealing small cracks—can help maximize the longevity of your crown, ensuring your chimney stays protected for generations.
Pre-Cast Crowns
On single flue chimneys, installation of a pre-cast crown is an option. In some cases, we are matching another existing chimney on a home, or matching the aesthetics of a communities’ chimney construction, that were built with these type crowns.
Chimney Crown Leaks vs. Roof Leaks: Telling the Difference
It’s common for homeowners to mistake a chimney crown leak for a typical roof leak, especially when water stains appear where the chimney meets the ceiling or wall. However, there are some telltale signs to help you figure out where the water is really getting in. If water stains persist near the chimney, even after multiple attempts at fixing or re-flashing the surrounding roof, your culprit might be the crown itself.
Here’s what to watch for:
- Persistent Ceiling Stains: If water marks keep coming back above or adjacent to your fireplace, despite roof repair work, suspect the crown. Water entering from a cracked or deteriorated crown will travel down the flue or exterior masonry and show up indoors.
- Inspection Findings: A close look at your chimney crown may reveal visible cracks, gaps, or deteriorated sections—especially after a Connecticut winter’s freeze and thaw cycle.
- Unchanged Flashing: If the flashing (the metal barrier where chimney meets roof) is in good shape but leaks continue, odds are water is sneaking past the crown.
If repainting the ceiling or patching flashing isn’t solving the issue, it’s time for a chimney professional to inspect the crown. Addressing the real source now can save hefty repair bills down the road.
If you believe your chimney crown needs attention, call the professionals at SafeSide Chimney. We will send a CSIA Certified Chimney Sweep Technician to inspect the crown and determine the best course of action.
Why Do Masonry Companies Charge More for Chimney Repairs?
Chimney repairs tend to be more expensive than other types of masonry work for a few reasons. First, these jobs are usually more labor-intensive and often require specialized tools, equipment, and safety measures—especially when working at heights on rooftops. Masons may need to set up staging or platforms just to reach the crown or upper chimney, and hauling materials up and down adds to the time involved.
Additionally, many masons prefer working on larger or simpler projects, like patios or walkways, which can be completed more quickly and with fewer complications. Chimney repairs can be tricky, messy, and unpredictable; every job is a little different, and surprises are common once you start pulling away damaged material.
Because of these extra challenges, masonry companies often factor in the additional time, effort, and risk when they provide an estimate. If the project is accepted at a higher rate, it compensates them for stepping away from their easier, bread-and-butter jobs, making it worth their while to take it on.
