Firebox joints and bricks repaired in Pembroke Park
Save 10% on firebox repair you approve within 72 hours of your free inspection at home.
- Owned and run locally
- Available for same-day service
- Fully licensed and insured
- Family owned and run
Firebox problems to mention when you call
- Grit falling from the firebox walls
- Rust streaks on the upper back wall
- Damper frame shifting in its bed
- Mortar washing out after rain
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Firebrick, refractory mortar and the repair plan
Room for the lining to expand with heat
Firebrick grows slightly as it heats. Brick industry guidance recommends a small air space between the combustion chamber and the masonry behind it. A compressible, noncombustible insulation keeps that space open, so the lining can move without pushing on the wall.
When a lining is rebuilt tight against the backing with rigid mortar, that allowance is lost. Cracks in the face or the wall behind can follow. On a rebuild we explain how the new lining will meet the backing, and the estimate names the material used between them where the design calls for it.
Keeping the chamber's shape during a rebuild
The code sets a minimum depth for a masonry firebox and ties the passage above it to the size of the flue. Those proportions help the fireplace draw. A rebuild that makes the chamber shallower, taller or narrower can create a smoke problem that was not there before.
We record the existing shape before removing anything and rebuild to it, unless the original was itself the cause of a fault. If a change is needed, we explain why and what it will do before you approve it. The estimate notes that the chamber keeps its proportions.
The top courses just below the damper
The highest courses of the firebox sit just under the throat and the damper. They take rising heat, any water that runs past the damper, and the weight of what sits above. Loose units here can affect how the damper seats.
We check those courses closely, often with the damper open and a light. Repairs at the top of the firebox are planned with the damper in mind, so its frame stays supported and its plate still closes. Any damper repair that follows appears as a separate item.
A firebox floor that is no longer level
A floor that dips, rocks or has lifted at one edge suggests the base beneath it has moved. Loose floor units can simply be reset, but a sunken area may point to the hearth support under the firebox.
We check whether the unevenness is in the units or below them. Lifting a floor unit or two can show what the bed looks like. If the support has failed, we explain what that means and hold the floor repair until it is understood, because new units on a moving base crack again.
Firebox repair lines you approve
- Each wall and the floor checked
- Replacement firebrick sized to the lining
- Laying pattern kept
- Damper or leak items listed separately
Before you book a firebox repair
Do you repair the floor inside the firebox?
Yes. The floor inside the opening is part of the firebox and takes heavy wear from grates, logs and tools. Loose or cracked floor units are reset or replaced in refractory mortar, and the grate is checked at the same time.
Can a high-temperature caulk seal firebox cracks?
Only if the product is a refractory mortar made for firebrick joints. Many heat-resistant sealants are made for lower temperatures and char or shrink in the fire chamber. We read the label before anything goes into a joint.
Could a firebox repair change how my fireplace draws?
Not if the chamber keeps its shape. We record the existing proportions and rebuild to them, because depth and shape affect draft. If a change is needed to fix a fault, we explain why before you approve it.
More Ways to Care for Your Fireplace
- Chimney Leak RepairFind the chimney water entry point and plan a repair before restoring the damaged finish.
- Chimney Animal RemovalAssess occupied chimney openings and plan appropriate follow-up cleaning or entry protection.
- Fireplace Hearth RepairRepair the hearth surface after considering the supporting assembly and fireplace requirements.
- Fireplace RestorationCoordinate fireplace repairs while preserving suitable existing features and defining the intended use.
- Chimney RebuildRebuild the affected chimney section with the retained structure, roof connection and passage included in the plan.
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Local service. Careful repairs. A fireplace worth coming home to.
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Chimney & Fireplace Brands We Work With
DuraVent 
Olympia Chimney and Venting 
Copperfield Chimney Supply 
Rutland 
Heatilator 
Heat & Glo