Chimney Crown Repair & Rebuild

The chimney crown is the concrete or mortar cap that covers the top of the brick chimney structure, surrounding the flue tile opening and directing water away from the flue and masonry below. Over time, Colorado's freeze-thaw cycles cause crowns to crack, crumble, and ultimately fail — allowing water to seep into the chimney structure and accelerate deterioration of the bricks, mortar, and liner beneath. Simmons Brothers Chimney Sweeps repairs and rebuilds chimney crowns in Westminster using professional-grade crown coatings for minor cracking and full mortar or concrete rebuilds for severely damaged crowns.

A neglected chimney crown can cause a cascade of damage. Water that enters through crown cracks works its way into the chimney structure, expands when it freezes, and progressively spalls bricks and deteriorates mortar joints — a process that repeats every winter. Catching crown damage early with a sealant application or minor repair is far less expensive than waiting until the masonry itself requires extensive tuckpointing or rebuilding. After completing the crown repair, we apply a waterproof elastomeric crown coat that flexes with temperature changes rather than cracking the way standard mortar does, providing long-lasting protection suited to Colorado's climate.