Cracked Chimney Crowns? Why You Should Fix Them Before Winter Hits

A small crack at the top of your chimney may seem harmless—but when winter arrives, it becomes a hidden highway for moisture. In Minnesota and Wisconsin, cracked chimney crowns are among the most common causes of chimney leaks and structural damage.

At Chimney Crickets, we’ve repaired numerous chimneys across suburbs like Woodbury, Eden Prairie, and Maple Grove where cracked crowns led to major masonry problems months later. Here’s why it’s critical to address crown damage now.

🔍 What Is a Chimney Crown—and Why It Matters

The chimney crown (or wash) is the concrete cap that sits atop your chimney’s brick structure. Its job is to slope rainwater away from the flue surface and masonry. A properly built crown helps protect your chimney’s bricks, mortar, and internal flue from freeze-thaw damage.

🚩 Signs You Have a Cracked Chimney Crown

• Hairline fractures in the crown surface

• Spalling or chunks of concrete missing

• Visible mortar gaps between crown and brick

• Water stains or efflorescence near your firebox or walls

• Loose or cracked flashing around the chimney top

Crown cracks may look minor, but they expose the chimney to repeated moisture—and in MN winters, that cycle accelerates damage quickly.

💧 Why Ignoring a Cracked Crown Causes Big Problems

Each time water gets inside a cracked crown, it enters the masonry and freezes. That expansion widens cracks, dislodges bricks, and erodes mortar joints. Over time, this can weaken the chimney’s structure, leading to spalling, leaks, or even portions collapsing.

Fixing a cracked crown promptly prevents costly repairs—or worse, a full chimney rebuild.

🛠️ How Chimney Crickets Repairs Chimney Crowns

When you book a crown repair with us, here’s what we do:

1. Remove deteriorated mortar and clean the brick surface
2. Rebuild or resurface the crown using slope-corrected, weather-resistant masonry
3. Ensure proper overhang and flashing integration to channel water away
4. Apply a breathable waterproof sealant to prevent moisture intrusion
5. Document before-and-after with photos and provide a full service report

Most crown repairs are completed within a day and are backed by a workmanship guarantee.

🏠 Trusted in 70+ Communities Across MN & WI

From Saint Paul and Shakopee to Cottage Grove, Rogers, and beyond, Chimney Crickets has serviced homes for over 35 years—protecting fireplace safety and chimney health across Minnesota and western Wisconsin.