Cracked firebrick and refractory panels
A masonry firebox is lined with firebrick laid in refractory mortar. The joints erode with heat before the bricks do, and open joints let heat reach the masonry behind. Repair means raking out failed joints and repointing with refractory mortar, or replacing bricks that have cracked through.
A factory-built fireplace uses refractory panels instead of brick. Fine surface crazing on a panel is normal wear and can be watched. A panel cracked through, or missing a piece so the metal behind shows, is replaced with the manufacturer's specified part, because the California Residential Code requires factory-built fireplaces to be installed as listed.
Rusted dampers and door frames in coastal Long Beach
In a house close to the shore, the fireplace's metal parts sit in a draft of damp, salty air whenever the damper is open or leaking. Damper plates rust and stop sealing, handles seize, and glass door frames corrode at their fixings. Where the cap above has failed, rust scale also drops onto the damper.
A rusty damper that still moves can often be cleaned and adjusted. One whose plate has warped or rusted through is replaced, either like for like or with a top-sealing damper fitted at the top of the flue. In houses further from the water, a failed damper is more often warped by heat than eaten by rust.
Tell us whether the fireplace is wood or gas, brick or factory-built, and what it does when you try to use it. Send the details of the issue and request an estimate for the specific work.
Gas fireplaces and the no-burn days
Gas fireplaces are not subject to the South Coast AQMD's no-burn alerts. Typical faults on a gas unit are a pilot that will not stay lit, an igniter that clicks without lighting, and glass that has gone cloudy or black. A pilot that keeps going out is often a dirty or failing thermocouple or thermopile rather than a supply problem.
A vented gas log set in an older masonry fireplace usually comes with instructions requiring the damper to be fixed so it cannot close fully. If logs were added and the damper still shuts completely, raise it when asking for an estimate.
Fireplace repair cost variables
Fireplace repair runs from a new thermocouple to a rebuilt firebox, so the price follows the diagnosis:
- 1Masonry or factory-built, and for factory-built units, whether the manufacturer's parts are still available.
- 2Wood or gas, and for gas, which component has failed.
- 3How much firebrick or panel needs replacing.
- 4Whether the damper can be adjusted or has to be replaced, and with what type.