Crown repair for chimneys in Miami Springs

If a coating will not hold on your crown, we say so and explain what replacement involves.

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Clues that point to the chimney crown

A crack running outward from a flue
Concrete chips in the gutter
Dampness at the fireplace after heavy rain
A flat top with no visible slope

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Crown repair that starts with an assessment

Fine surface cracks on an otherwise firm crown

Hairline cracks are common in cast concrete. Brick industry guidance treats shrinkage of a cast crown as certain while it cures. The question is whether the cracks stay shallow or reach through the crown.

On a firm crown with fine surface cracks, a brushable crown coating can bridge them and keep water out. We confirm that the concrete around each crack is sound before recommending it. If the cracks open into loose sections, a coating is the wrong tool, and we explain the alternative.

Rescheduling crown work around rain

Coatings need a dry surface and dry hours afterwards. Fresh concrete also needs protection from heavy rain while it sets. Both depend on the weather on the day, not the forecast from last week.

If rain threatens, we may protect the work with sheeting or move the date. We contact you as early as we can when a change is needed. A short delay is better than redoing a coating that washed off or a crown surface that was pitted by rain.

What removal can reveal under the crown

Some conditions stay hidden until the old crown is off. The top course may be loose, the bedding mortar may have washed out, or a liner may be cracked at the top. None of these can be confirmed from the surface alone.

We tell you before work starts that these are possibilities. If one turns up, we stop, show you and explain what it means. Any added work is priced as a separate item for your approval. The crown portion of the job stays at the agreed scope.

Plain questions to ask about crown work

A good crown proposal should answer a few plain questions. Ask what is wrong with the crown, what causes it and what the repair changes. Ask what happens at the flue joints and whether the cap comes off.

Also ask what the work does not cover. A crown repair does not fix the flashing, the liner or the brick lower down. We answer those questions in writing on your estimate, so you know exactly what you are approving and what remains separate.

The crown repair items you approve

Slope and drainage off the top
Removal of loose or hollow sections
Bond-break layer under new concrete
Protection for roof covering and brick faces

Chimney crown questions we hear

Can a crown with fine cracks be sealed rather than replaced?

It can, when the concrete around the cracks is firm and the crown still sheds water. A crown coating goes on a clean, dry and sound surface. If the top is loose, hollow or flat, sealing only hides the fault, so we explain replacement instead.

What does the free inspection include for a chimney crown?

We look at the crown surface, edges, slope, overhang and the seal at every flue, plus the cap fixings and the brick just below. You hear the findings on site and receive a free written estimate that keeps each item separate.

Is there a better time of day for crown coating work?

The product data sets temperature limits and asks for a dry surface with no rain due. On hot days we may work earlier or later so the coating goes on within those limits. We confirm timing when we schedule.

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(645) 465-4171

Chimney & Fireplace Brands We Work With

DuraVent
Olympia Chimney and Venting
Copperfield Chimney Supply
Rutland
Heatilator
Heat & Glo