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Firebox repair and relining in Belle Isle

One cracked brick or a whole new lining, our technicians repair fireboxes across Belle Isle. Book a no-charge inspection today.

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Firebox scope for Belle Isle homeowners

  1. Failed patch and wrong material removal
  2. Corner and side wall joint repair
  3. Full firebox rebuild when walls have failed
  4. Brick around the damper frame

Firebox repair notes for Belle Isle homeowners

Refractory mortar holds the firebox together

The joints between firebricks need a mortar made for heat. Section R1001.5 of the Florida residential code calls for medium-duty refractory mortar conforming to ASTM C199, the standard used to rate refractory mortars.

Ordinary masonry mortar can crumble and wash out of a firebox joint after repeated fires. Our technicians remove failed joint material and relay or repoint with refractory mortar, and the product we use is written on your job sheet so the next person to look at the fireplace knows what is there.

The lining and the wall behind it

Section R1001.5 of the Florida residential code describes a firebrick lining at least two inches thick, with the back and side walls reaching at least eight inches of solid masonry including that lining. The lining takes the fire, and the masonry behind it adds the rest of the protection.

When bricks are missing or badly eroded, the protection is thinner than it should be at that spot. Our technicians check how much sound lining remains and whether the wall behind it is intact before recommending a patch, a partial reline or a rebuild.

Where the firebox ends and the throat begins

Above the firebox, the passage narrows into the throat and opens into the smoke chamber. Those parts are built differently and wear differently, so a crack that starts in the firebox and continues upward can involve more than one repair.

We follow any crack as far as we can see it. The firebox repair covers the lined box itself. If the damage continues into the smoke chamber, that goes on the estimate as smoke chamber repair, a separate line with its own explanation.

What stays in place during a firebox rebuild

A firebox rebuild does not mean rebuilding the whole fireplace. The decorative facing, the mantel and the hearth extension usually stay, and the work happens inside the opening.

Our technicians explain before the job what the rebuild touches and how we protect the facing and hearth while we work. If any surrounding surface might be affected, the estimate says so, so there are no surprises when the dust settles.

A painted or coated firebox interior

Some fireboxes have been painted or coated to freshen their look. Paint can hide cracks and eroded joints, and some coatings peel or blister when heated.

Our technicians check under any coating for the brick and joints beneath. If loose coating needs to come off before a repair, the estimate says so. We do not recommend painting over a damaged lining in place of repairing it.

Before your firebox visit in Belle Isle

Why can't ordinary mortar be used inside the firebox?

Ordinary mortar is made for normal temperatures and can crumble after repeated fires. The Florida residential code calls for firebrick to be laid with medium-duty refractory mortar, and that is what our crew uses.

My fireplace has brick-pattern panels. Is that the same repair?

No. Molded panels belong to a factory-built fireplace and are replaced with parts made for that model. That is prefab fireplace repair, a different job from firebrick work, and we check which you have first.

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