The crown is your chimney's concrete roof. When it cracks, everything below it starts absorbing water — so we fix crowns before the damage travels.
Capping the highest point of a masonry chimney is the crown — a sloped slab of concrete, sometimes called the crown wash, that covers the brick from the flue tiles out to the outer edge. Its whole job is steering rain off the stack. Crowns fail in predictable ways: shrinkage cracks appear as the concrete cures and widen with age, the surface erodes under decades of pounding rain, and rigid contact between the crown and the expanding flue tiles splits the slab from the inside out. Once cracks open, every storm sends water down into the brick cores and mortar below.
The right fix tracks with how advanced the deterioration is. Sound crowns with hairline or map cracking can be cleaned and coated with an elastic crown sealant that spans the cracking and rides along with the slab through Miami's daily heat swings. Crowns that are crumbling, delaminating, or poured too thin to save are broken out and recast: we pour a fresh concrete crown with a proper slope, a drip edge projecting past the brick, and an expansion gap around the flue tiles so the new slab cannot split the way the old one did. Whichever route fits, the estimate arrives written, specific, and free.
A crown in Pinecrest lives at the most exposed point of the house — above the shade of even the village's tall oak canopy, in direct sun almost daily, all year long. That constant UV and heat cycling works the concrete from sunrise to the afternoon thunderstorm, when a slab that has been baking at rooftop temperature suddenly gets doused with cool rain. Concrete does not enjoy that routine. Add some of the country's heaviest annual rainfall pounding a horizontal surface, and it is no surprise that crown cracking shows up on a big portion of the chimneys we examine here.
Many ranch homes that went up across Pinecrest during the fifties, sixties, and seventies were finished with thin mortar-wash crowns — a trowel of leftover mortar sloped over the top course rather than a true reinforced slab. Sixty years on, those washes are eroded, cracked, and in some cases mostly gone. Falling debris makes it worse: oak and banyan limbs coming down in a summer storm land on the crown first, and one good impact can fracture even a healthy slab. When we recast a crown here, we build it thick, sloped, and overhung so it stands up to both.
Structurally sound crowns with surface cracking are cleaned, patched, and finished under an elastomeric membrane that flexes with the slab instead of splitting.
Failed crowns are removed down to the top course and re-poured in reinforced concrete with the correct slope for fast drainage.
We form the new crown to overhang the brick with a drip kerf underneath, so runoff drops free of the brickwork instead of streaking down the stack.
A bond-break gap with backer rod and sealant is built around the flue tiles, letting the clay expand in the heat without cracking the slab.
Thin builder-era mortar washes are replaced with true concrete crowns — the upgrade most older chimneys in this area have never received.
Crowns fractured by falling limbs or wind-borne debris are assessed, patched where possible, and recast when the break runs deep.
We assess the slab's thickness, slope, overhang, and crack depth to determine whether sealing will hold or recasting is warranted.
Your free written estimate states plainly which repair the crown needs and why, with upfront pricing for each option.
We complete the coating, or form up and place the replacement crown, building in the slope, drip edge, and flue expansion gap that the original likely lacked.
We protect the work while it cures, then verify drainage and finish before considering the job closed — and stand behind it with our workmanship warranty.
Free written estimates · Upfront pricing · Same-day service available
The cap is the metal hood guarding the flue opening itself; the crown is the concrete surface sealing the masonry that surrounds it. They fail differently and are fixed differently, though a chimney missing both is taking water two ways at once. We handle both, and you'll hear which one your problem actually is.
Yes, and it is a slow burn. Water entering through crown cracks saturates the upper brick, migrates down the cores, and eventually reaches ceilings and framing. Some of the worst interior water damage we trace in this area began as a crown crack slimmer than a pencil line.
It comes down to structure. If the slab is thick, well-anchored, and cracked only at the surface, a flexible coating is a durable, economical fix. If it is thin, crumbling, delaminating, or split through, coating it just decorates a failure. We evaluate honestly and put the recommendation in writing.
The pour itself is finished in a day, and we time the work around the afternoon storm pattern. The concrete reaches working strength within days, though full cure continues for weeks. We cover the fresh crown so a surprise downpour cannot mark the surface while it sets.
If the crown is the entry point, yes. But water can also enter at the cap, the masonry faces, or the roofline, and more than one entry is common on older stacks. Before we recast, we confirm the crown is truly the source, so your money goes toward the right repair.
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