Family-run firebox repair in St. Nicholas
Firebrick replaced to size and joints kept at a quarter inch or less, on St. Nicholas fireboxes inspected free of charge.
- Fully licensed and insured
- Locally owned
- Family owned and operated
- Same-day service
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Local firebox pros who price wall by wall
- 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 St. Nicholas 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.
Bricks that move when you touch them
A firebrick that rocks under a finger has lost the mortar on at least two sides, and the joints around it may be open too. Pushing on it to see how loose it is can drop it into the firebox, so leave it where it is and keep the fireplace out of use until it is looked at.
On the visit we tap the whole wall, since one loose brick can have neighbors on the way. The repair resets the loose brick and repoints the joints around it in medium-duty refractory mortar. Loose firebrick in your St. Nicholas fireplace? Phone (904) 920-5495 for a free check.
The county for St. Nicholas is Duval County. St. Nicholas is inland.
What firebox repair covers in St. Nicholas
- Open joints raked out and repointed in refractory mortar
- Back walls relined when patching will not hold
- Water-marked fireboxes dried before work begins
- Firebox rebuilds that keep the throat and depth to code
From a cold firebox to the first fire in St. Nicholas
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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.
A firebox worn by years of use in St. Nicholas
Away from the shore, a firebox in St. Nicholas ages at the pace of its fires. A lining that has carried many seasons can be thin across the whole back wall rather than failed in spots.
We measure what remains and quote a reline where patching would not last.
10% off any service booked within 72 hours of inspection
A firebox repair in St. Nicholas booked the same day we inspect it is discounted too.
Why fresh mortar waits days for a fire
Water goes into a joint with the mortar, and that water has to leave before the mortar sees a flame. One medium-duty maker calls for a minimum of 7 to 10 days before heat is applied, and says a mortar that is not fully dry will crack from the pressure of water turning to vapor inside it.
Drying also depends on the job conditions, the temperature and the air in the room, so the date on the ticket is a minimum, not a promise that a thick joint is ready. We write it down before leaving, and the first fire after that date should be a small one.
Paint, sealers and new mortar
Fresh refractory mortar has to bond to clean masonry. One medium-duty maker states that its product cannot go onto a painted surface and that all paint must be removed for proper adhesion.
Painted or coated firebrick is therefore cleaned back to bare material wherever new mortar will touch it: the joint faces, the edges of a replaced brick and the opening a brick is set into. Paint on the rest of the lining can stay if you want it to, and the estimate states how much surface the cleanup covers. A coating on firebrick does not protect the lining from heat, so it is not a reason to skip a repair.
Clearances when a rebuild opens the wall
A full firebox rebuild can expose the framing around the fireplace. Section R1001.11 requires wood beams, joists, studs and other combustibles to stay at least 2 inches from the front faces and sides of a masonry fireplace and 4 inches from the back faces.
When a rebuild opens the masonry far enough to see those distances, we check them and write down what we found. Framing closer than the code allows goes on the estimate as a separate item, since it has to be corrected before the fireplace is used again. A lining repair alone does not open the wall that far.
Walls, joints and cure time in writing
- Worn walls relined, with the firebrick thickness stated
- Old patches and bag mortar removed from repaired joints
- Floor firebricks lifted, rebedded and reset flat
- Product name and standard of every mortar and brick used
Firebox repair questions from St. Nicholas
Do you do firebox rebuilds as well as repairs?
Yes, where the backing masonry itself has failed as well as the firebrick. The rebuild keeps the code's wall thickness, the firebox depth and the throat height, and the estimate explains why a rebuild is needed.
What if the damper or smoke chamber needs work too?
Those go on the estimate as separate lines with their own prices. You can do them with the firebox repair or schedule them later.
More services in St. Nicholas
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Make your St. Nicholas firebox safe to use again
Loose brick or open joints in St. Nicholas? The firebox inspection is free.
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