Repairing and replacing chimney crowns in Miami Lakes
Crown repair in Miami Lakes starts with a free inspection and a plain explanation of what the chimney top needs.
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What a failing crown shows from the ground
- Hairline cracks across the crown surface
- A crack running outward from a flue
- Dried or split caulk around the flue
- Moss or growth holding on the crown
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Getting the chimney crown right in Miami Lakes
Choosing the sealant for the flue joint
Not every tube of caulk belongs on a chimney top. Brick industry guidance recommends a good grade of polysulfide, butyl or silicone rubber sealant at this joint and warns against oil-based sealants. Proper priming and a backing rope are part of the detail.
We tell you which sealant family we plan to use and why. The joint is cleaned and prepared before the new bead goes in. If an earlier repair used a product that has cracked or hardened, we remove it rather than run a new bead over the top.
Flashing beneath a new cast crown
Brick industry guidance highly recommends flashing under a cast-in-place crown and notes that it can also serve as the bond break. The layer separates the new concrete from the brick and helps keep water out of the wall below.
This flashing is different from the roof flashing where the chimney meets the roof. We explain both terms so your estimate does not blur them. If the roof flashing also needs work, it appears as a separate item, and the crown scope stays limited to the top.
Crown pieces found on the roof or in gutters
Small pieces of concrete near the base of a chimney can come from the crown edge. They break away where the concrete is thinnest or where water has worked into cracks. Sometimes they collect in gutters and go unnoticed for a while.
Keep the pieces if you find them and mention where they landed. Their size and shape tell us something before we even reach the roof. Keep people away from the area below the chimney if pieces are still falling, and tell us so we can plan the inspection with that in mind.
Removing an old crown without loosening brick
Breaking out a failed crown needs control. The aim is to remove the unsound concrete while leaving the brick below and the flue liners undisturbed. Heavy-handed demolition can loosen the very courses the new crown must sit on.
We remove old crown material in sections and check the brick as it is exposed. If a liner or a course of brick is already loose, we stop and explain before going further. The estimate describes the removal method so you know what to expect on the day.
What your crown estimate lists
- Sealant joint around the flue tiles
- Formwork for a cast-in-place crown
- Top course brick condition below the crown
- Aftercare instructions for the new surface
Answers about chimney crown work
What happens if rain is forecast on the day of the repair?
Coatings and fresh concrete need a dry surface and time to cure. If rain threatens, we may protect the work with sheeting or move the date. We tell you before the visit rather than risk a finish that washes off.
What if my chimney has a metal top instead of concrete?
Some masonry chimneys carry a metal or stone top rather than cast concrete. A framed chimney with a sheet-metal cover has no crown at all. We identify which one you have before suggesting any crown work.
Do you seal the crown and the chimney brick at the same visit?
They are separate products and decisions. A crown coating treats the top surface. A water repellent for brick is considered only after cracks and joints are repaired, and it should let the masonry breathe. Each appears as its own line.
More Ways to Care for Your Fireplace
- Chimney Chase Cover ReplacementReplace the chase top with a properly planned cover and clearly defined pipe connections.
- Chimney Masonry RepairRepair affected chimney brickwork and joints with materials selected for the construction already in place.
- Chimney Leak RepairFind the chimney water entry point and plan a repair before restoring the damaged finish.
- Chimney Damper Repair and ReplacementRestore a usable damper mechanism after checking the plate, frame and control linkage.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo