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Wood fireplace installation

Firebox to damper

Wood-Burning Fireplace Repair for San Francisco Homes

Cracked firebrick, crumbling mortar joints, a damper that won't close and smoke that rolls into the room are the problems behind most wood-burning fireplace repair. We find what's wrong with the firebox, damper and smoke chamber, explain it plainly, and fix it.

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What wood-burning fireplace repair covers

A wood fire puts more heat, soot and moisture-laden smoke through a fireplace than any other fuel. Over years of fires, that wears down the parts that hold the fire and guide the smoke up the chimney. Wood-burning fireplace repair restores those parts so the fireplace burns safely and draws properly again.

Technician repairing a firebox

It is a focused part of our broader fireplace repair service, which also covers prefab units, doors, glass and restoration work. If your fireplace runs on gas or plugs into the wall, the work is different. Gas fireplace work is offered, and plug-in units are handled through electric fireplace repair.

The parts we work on

  • Firebox: the masonry box that holds the fire, lined with heat-resistant firebrick set in refractory mortar.
  • Mortar joints between firebricks, which shrink, crack and wash out with repeated heating and cooling.
  • Damper: the metal plate that closes the flue when the fireplace isn't in use, which can rust, warp or seize.
  • Smoke chamber: the sloped area above the damper that funnels smoke into the flue, where rough or cracked surfaces can slow the draft and collect creosote.
  • Hearth and surround, where loose or cracked pieces can let heat reach materials behind them.
  • Fireplace doors and glass, which control airflow and keep embers in the firebox.

Signs your wood-burning fireplace needs repair

Call for a look if you notice any of these

  • Firebrick that is cracked through, spalling (flaking off in layers) or loose
  • Mortar joints with gaps deep enough to see into or crumbling when touched
  • Smoke drifting into the room instead of going up the chimney
  • A damper that sticks, won't seal, or has come off its track
  • Rust flakes or debris falling into the firebox
  • Cracks in the hearth or gaps between the hearth and the firebox
  • Fireplace doors that won't close or glass that is cracked

Smoke coming into the room has several possible causes, and not all of them are repairs inside the firebox. When the trouble is how the fireplace draws, we look at it as fireplace draft repair, which checks the damper, smoke chamber, flue and the way air moves through the house.

Hold off on fires if the firebox is cracked through

Gaps in a firebox or its mortar can let heat and embers reach the framing behind the masonry. If you see open joints or bricks cracked all the way through, it is generally wise to stop burning until the fireplace has been checked.

What the repair visit involves

From first look to finished repair

  1. Inspect the fireplace

    We check the firebrick, mortar joints, hearth, damper and doors, then look up into the smoke chamber with a light.

  2. Explain what we found

    You get a plain account of what is damaged, what is normal wear, and what can wait. Estimates are free.

  3. Protect the room

    The hearth area and nearby floor are covered before any cleaning or masonry work begins.

  4. Make the repair

    That can mean replacing damaged firebrick, repointing joints with refractory mortar, repairing the smoke chamber, or fixing or replacing the damper, depending on what the inspection showed.

  5. Check the finished work

    We confirm the damper opens and seals and talk you through any cure time before the first fire.

Repair it or rethink the fireplace?

Most wood-burning fireplaces are worth repairing. Some homeowners use a repair visit to decide whether they want to keep burning wood at all. If you're weighing that choice, our guide to gas vs wood burning fireplace sets out the differences in upkeep, heat and daily use.

Booking a wood-burning fireplace repair

Call or request an estimate and tell us what you're seeing: cracked brick, smoke in the room, a stuck damper, or anything else that seems off. Commercial and property-manager work is offered too.

Wood-Burning Fireplace Repair: common questions

Can I keep using my fireplace if a firebrick is cracked?

Sometimes. A fine surface crack in a firebrick is often cosmetic, but a brick cracked all the way through, a loose brick or an open mortar joint can let heat reach the structure behind the firebox. Until someone has looked at it, it's safer not to burn.

Do you take emergency calls or work at night?

Yes. Emergency calls are accepted, and 24-hour service runs Sunday–Friday. Stop adding fuel, open a window and don't relight the fire until the chimney has been checked. If the smoke is heavy, an alarm sounds or you suspect a chimney fire, get everyone outside and call 911.

Can you come out the same day?

Sometimes. Same-day visits are available where the schedule allows, so it depends on that day's bookings. Booking ahead gives you the most choice of times.

Why does my wood fireplace smoke into the room?

A fireplace smokes back when the smoke can't rise up the flue fast enough. Common reasons include a damper that isn't fully open or is damaged, a rough or cracked smoke chamber, a blocked flue, or a house that pulls air in through the fireplace. Finding which one it is comes first, because each has a different fix.

What's the difference between repairing the firebox and repairing the chimney?

The firebox is the brick-lined box where the fire burns, and the chimney is the structure that carries smoke from the smoke chamber up and out of the house. Firebox work is done from inside the room. Chimney repair covers the flue, liner, crown, cap and outside masonry. One inspection can show which parts need attention.

Do you work on all fireplace makes?

Yes, we work on all major brands. Wood-burning masonry fireplaces are usually site-built, so the repair depends on how your firebox and damper were built rather than on a brand name.

Free Estimates

Talk to us about wood-burning fireplace repair

Describe what’s wrong and when it started. We’ll explain the likely cause and the next step before anything is booked.