Cracked firebox repair in Sandalwood

A cracked firebox in Sandalwood gets a written plan after a free look: watch it, repoint it, replace a brick or reline the wall.

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(904) 920-5495 Free Inspection

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

The mortar's cure time goes on the ticket, so the first fire after the repair waits until it is ready.

Free inspection and estimateEvery wall of the firebox in Sandalwood 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.

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Chipped bricks at the front edge

The firebricks at the front edge of the firebox, along the sides of the opening, take knocks from fire tools, the grate and logs going in. Chipped corners there look worse than they are, but an edge brick missing a thick chunk leaves the joint behind it exposed to the fire.

We replace edge bricks that have lost real depth and leave shallow chips alone, and the estimate says which is which so you are not paying for cosmetic work you did not ask for. Front-edge firebricks chipped in your Sandalwood fireplace? Book the free check at (904) 920-5495.

Sandalwood is part of Duval County. Sandalwood lies inland.

Firebox work for Sandalwood fireplaces

Back walls relined when patching will not hold
Bowed walls checked against the masonry behind them
Firebox floor bricks lifted and reset flat
Firebox rebuilds that keep the throat and depth to code

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How firebox repair runs

Keep the firebox cold
Let the fireplace go unused for several hours ahead of our visit, so each wall is cool to the touch.
Tap, probe and mark
Each brick is sounded, each joint probed, and the failed ones marked and written up by wall.
Rake, rebrick or reline
Joints are raked and repointed, failed bricks replaced and worn walls relined in C199 mortar.
Cure date on the ticket
The mortar maker's drying time sets the date of the first small fire, written down before we leave.

New firebrick next to old in Sandalwood

Inland or coastal, new firebrick comes out of the box lighter than a lining that has seen years of fires in Sandalwood. The difference shows most on a back wall with a few replaced bricks.

We tell you before ordering how close the color will be, and the new bricks darken with use.

10% off any service booked within 72 hours of inspection

Open firebox joints? The repair you book before three days are out is 10% off.

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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.

When the firebox is a steel unit

Behind some masonry fireplace openings there is no firebrick box at all. Section R1001.5.1 of the Florida code permits a steel fireplace unit built into solid masonry, installed to its listing or to the section's own rules.

A steel firebox is repaired as the metal unit it is, not with firebrick and refractory mortar, and the listing or the maker's instructions set what can be done to it. When we find a steel unit, the estimate says so and describes its condition, including any warping or rust through the metal, and whether parts can still be had for it.

Where the firebox ends and the smoke chamber begins

Over the throat, the smoke chamber narrows toward the flue, and the code (R1001.8) wants its inner surface parged smooth with ASTM C199 refractory mortar, the same class used in the firebox joints, but it is a separate part of the fireplace and a separate repair.

During a firebox repair we look up through the damper with a light. When parging is missing or the chamber walls are rough or open, it goes on the estimate as smoke chamber repair, a line you can schedule with the firebox or later. Doing both on one visit saves setting up twice, but the choice is yours.

Checked in Sandalwood before any brick comes out

Each firebox wall and the floor tapped, probed and marked in chalk
Cracked or hollow firebrick cut out and replaced one at a time
Paint cleaned off wherever new mortar has to bond
Water marks traced to their source and listed separately

Before the first fire after a repair

Is refractory caulk good enough for firebox joints?

Not for every joint. Florida's code wants firebrick laid in C199 medium-duty refractory mortar, with joints kept to a quarter inch. We read the product's stated standard and joint range before using it.

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.