Local firebox repair for San Marco homes
Every wall of your San Marco firebox quoted separately after a free check by our family crew, with nothing added later.
- Fully licensed and insured
- Locally owned
- Family owned and operated
- Same-day service
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Firebox specialists who test every brick in San Marco
- Locally owned in Jacksonville
- Family owned and operated
- 100% satisfaction guaranteed
- Free inspection and estimate
- Same-day service available
- 10% off any service
Firebrick joints are refilled with ASTM C199 medium-duty refractory mortar, the class the Florida code names.
- Free inspection and estimateEvery wall of the firebox in San Marco is tapped and probed cold, and the failed bricks and joints are marked at no charge.
- Upfront pricing, no hidden feesEach wall is quoted for what it needs, a few joints, a few bricks or a full reline, so a small repair stays small.
- 100% satisfaction guaranteedIf a joint we repointed opens again after it has cured and been used as the ticket says, we come back and redo it.
A cast firebox inside the masonry
Some masonry fireplaces were built around a cast refractory firebox or throat piece instead of laid firebrick. The repair question is different, since a cracked casting is not repointed like a brick wall and may not be sold as a separate part.
We identify what the firebox is made of first, then write down whether the casting can be repaired in place or the section has to be replaced, and what the fireplace around it needs. Not sure what the firebox in your San Marco home is made of? One free visit answers that, booked at (904) 920-5495.
San Marco does not reach the coast. San Marco is a neighborhood within the City of Jacksonville.
Firebox work for San Marco fireplaces
- Failed patches removed and the joints redone
- Gaps along the base of the walls repointed
- Cast refractory pieces assessed before any repair
- Water-marked fireboxes dried before work begins
Tap, probe, repair, cure
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Keep the firebox cold
Let the fireplace go unused for several hours ahead of our visit, so each wall is cool to the touch.
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Tap, probe and mark
Each brick is sounded, each joint probed, and the failed ones marked and written up by wall.
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Rake, rebrick or reline
Joints are raked and repointed, failed bricks replaced and worn walls relined in C199 mortar.
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Cure date on the ticket
The mortar maker's drying time sets the date of the first small fire, written down before we leave.
Painted firebrick in San Marco homes
Inland homes in San Marco sometimes have fireboxes painted to cover stains. Paint hides joint wear and keeps new mortar from bonding.
We clean the paint off where repairs go and leave the rest as you choose.
10% off any service booked within 72 hours of inspection
Book firebox repointing or rebricking in San Marco within 72 hours of the inspection and 10% comes off.
What firebox brick is made to do
Firebrick is a different product from the face brick you see on the outside of a house. ASTM C1261, the specification for firebox brick in residential fireplaces, covers brick made from clay, fire clay or shale and fired until its particles bond, then tested for strength, for the heat it takes before softening, and for size and warp.
The Florida Building Code, in R1001.5, accepts firebrick meeting either C1261 or ASTM C27, the classification of fireclay and high-alumina refractory brick. When we replace a brick, the new one meets one of those two, and the ticket names which, so a later repair can match it.
Doors, inlets and a hotter firebox
Fireplace doors closed during a fire, or an outside air inlet blowing fast into the firebox, can raise the temperature inside it. The Brick Industry Association warns that higher temperatures of that kind can warp grates and lead to early breakdown of the firebox mortar joints.
When a lining shows wear out of step with its age, we look at how the fireplace is run as well as at the brick. The repair still uses the same firebrick and mortar, but the estimate notes the likely cause so the new joints are not lost the same way. Opening the doors during a fire, or partly closing an inlet, are the usual changes to talk through.
The firebox floor and the hearth under it
Under the firebrick floor of the firebox is the hearth, which the Florida code requires to be at least 4 inches thick and built of concrete or masonry on noncombustible support. A floor brick that sinks or rocks may point to a bed that has eroded or a hearth that has cracked beneath it.
We lift the failed floor bricks, check the bed and the hearth below, and reset the floor flat in refractory mortar. Cracks in the hearth slab, or in the extension that runs out in front of the opening, are written up as hearth work, which has rules and a price of its own.
Walls, joints and cure time in writing
- Worn walls relined, with the firebrick thickness stated
- Firebox depth measured before any relining is planned
- Back wall slope and throat height kept on any rebuild
- Product name and standard of every mortar and brick used
Firebox repair questions from San Marco
Why not fill the cracks and paint over them?
Paint does nothing for the lining and keeps new mortar from bonding. Open joints need raking and refilling, and cracked bricks need replacing, so the repair lasts.
Is the inspection really free?
Yes. The firebox check and the written estimate cost nothing, and the pricing is upfront with no hidden fees. Book the repair within 72 hours of the check and 10% comes off.
More services in San Marco
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Make your San Marco firebox safe to use again
Book a free firebox inspection in San Marco at (904) 920-5495; a repair you approve inside three days of it is 10% off.
Free Inspection