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In Nanaimo's high-moisture climate, cracks, leaks, and loose mortar accelerate structural deterioration rapidly, risking extensive and costly damage to your home. We don't provide general estimates; we offer a professional, structural assessment of your chimney's integrity, diagnosing the root cause of issues like leaks, spalling, or crown failure. Contact us now to schedule your free, no-obligation repair consultation. Our specialists will provide a clear, detailed quote based on permanent, lasting solutions.

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Permanent Chimney Crown Repair & Custom Concrete Rebuilds in Nanaimo, BC

The chimney crown is your chimney’s most crucial line of defense. If you see cracks, rust stains, or pieces of concrete falling onto your roof, your home is at immediate risk of severe water damage. We build custom-formed, water-shedding concrete crowns designed for the harsh Vancouver Island climate. Often mistaken for a simple patch of cement, the chimney crown is a vital structural slab that covers the top of your masonry, directing rain and snow away from the brick structure below and preventing water from entering the flue system. Most leaks start right here. Unfortunately, many crowns are poorly built from thin, weak mortar washes that crack within a few years. We specialize in the construction of proper cast-in-place concrete crowns featuring a critical drip edge and a downward slope. This professional approach ensures superior durability and maximum water resistance, protecting your chimney and home for the next 50 years. If your crown is cracked or crumbling, call our Nanaimo experts today for a solution that lasts.

The Difference Between a Short-Term Fix (Wash) and a Lasting Crown

A crown is constantly exposed to the elements—direct sunlight, heavy rain, and the damaging freeze-thaw cycle that is common in BC winters.

Signs Your Chimney Crown Has Failed:

Visible Cracks: Even hairline fissures allow water to penetrate the chimney, where it freezes, expands, and widens the crack, leading to rapid deterioration.

Spalling Bricks Below the Crown: If the bricks immediately below the top slab are crumbling, it means the crown lacks a proper drip edge and is allowing water to run down the face of the chimney masonry.

Rust Stains: Rust streaks running down the chimney exterior are often caused by water pooling on the crown and rusting the metal chimney cap or damper, confirming that water penetration is chronic.

Water Stains on Interior Walls: A leaky crown is a direct path for water to travel down the flue system and into your attic, walls, or firebox, causing expensive interior damage.

Why Our Custom Concrete Crowns Offer Superior Protection

A truly effective chimney crown must be made of poured, reinforced concrete, not a simple layer of surface mortar (often called a "crown wash"). Our permanent repair and rebuild process follows Chimney Safety Institute of America (CSIA) standards for maximum longevity:

Full Removal of Failed Crown: We carefully and safely remove the existing damaged or poorly constructed crown to ensure a clean, stable base for the new structure.

Custom Forming and Poured Concrete: We build custom forms on-site and pour a durable, thick concrete crown (not a thin mortar mix). Concrete is significantly more crack-resistant than mortar, providing a solid, monolithic slab of protection.

The Critical Drip Edge Overhang: The most important feature is the overhang (drip edge), which extends a minimum of two inches beyond the face of the brick. This overhang ensures that water sheds completely off the chimney structure and onto the roof, preventing it from running down the vulnerable mortar joints below.

Proper Flue Separation: We install an expansion joint around the flue liner, preventing contact between the concrete crown and the clay flue tile. This prevents cracking and allows for the natural expansion and contraction of the materials.

Waterproofing Sealant: Once the concrete is cured, we apply a high-grade, flexible, elastomeric chimney crown sealant for an added layer of defense against minor surface cracks and environmental wear.

Protect Your Home’s Value: Secure Your Nanaimo Chimney Top Today

A proper crown repair is a small investment that prevents massive costs down the road. By investing in a high-quality, custom-formed concrete crown now, you avoid the need for structural tuckpointing and costly interior repairs caused by long-term moisture exposure.

Don't wait until you see water damage inside your home. Protect the entire chimney system with the strongest shield possible.