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Fireplace repair

Smoke & Draft Problems

Fireplace Draft Repair for San Francisco Homes

When smoke drifts into the room instead of going up the chimney, something is interfering with the draft: the damper, the flue, the cap, or the air pressure inside the house. We find which one it is and fix that cause, not just the symptom.

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What fireplace draft repair actually fixes

A fireplace works because hot air rises. Once the flue warms up, the rising column of gas pulls smoke up the chimney and draws fresh air in across the fire. That pull is the draft. When it's weak or reversed, smoke rolls out of the firebox opening, the room smells of smoke for days, and the fire burns sluggishly.

Technician servicing a gas fireplace burner

Fireplace draft repair means finding what is breaking that pull and correcting it. There's rarely a single part to swap. The cause can be mechanical, like a stuck damper. It can be physical, like a blocked flue or a rough smoke chamber. It can also be a mismatch between the fireplace and the chimney, or the house competing with the chimney for air. Each cause has a different fix, so diagnosis comes first.

Signs your fireplace has a draft problem

Call for a draft check if you notice any of these

  • Smoke puffs or rolls out of the front of the fireplace, especially when the fire is first lit
  • A smoky smell in the room that lingers after the fire is out
  • Cold air or a sooty smell coming down the chimney when the fireplace isn't in use
  • The fire is hard to start, smolders, or dies down unless you leave the doors open
  • Black staining on the face of the fireplace above the opening
  • Smoke gets worse when kitchen or bathroom exhaust fans are running

The most common complaint is smoke coming into the room. It's worth taking seriously. Smoke that spills indoors carries soot and carbon monoxide, and it usually means combustion gases aren't leaving the house the way they should.

What usually causes poor draft

Common causes and how we check them

  1. 01Damper that won't open fully

    What you may notice
    Smoke from the moment the fire is lit; the handle feels stiff or doesn't move through its full range
    How it’s confirmed
    We operate the damper and look at the plate, frame and hinge for rust, warping or broken parts
    Damper that won't open fully: repair options
  2. 02Blocked or narrowed flue

    What you may notice
    Draft that was fine before and got worse; debris or twigs in the firebox; strong odor
    How it’s confirmed
    Visual and camera inspection of the flue for creosote buildup, nests, fallen masonry or debris
    Blocked or narrowed flue: repair options
  3. 03Rough or damaged smoke chamber

    What you may notice
    Smoke curls out at the top of the opening even with the damper open
    How it’s confirmed
    We inspect the area above the damper for stepped brick, gaps or crumbling mortar that cause turbulence
    Rough or damaged smoke chamber: repair options
  4. 04Missing or wrong chimney cap

    What you may notice
    Downdrafts on windy days, rain or animals getting into the flue
    How it’s confirmed
    We check the top of the chimney for a cap and whether it suits the flue
    Missing or wrong chimney cap: repair options
  5. 05House pressure pulling against the chimney

    What you may notice
    Smoke gets worse with exhaust fans, a dryer or a furnace running, and better when a window is cracked open
    How it’s confirmed
    We test the fire with fans on and off and with a window open to see if the house is starving the fireplace of air
    House pressure pulling against the chimney: repair options

Sometimes the issue is simply that the flue is dirty. Heavy soot and creosote narrow the passage and slow the draft, and a thorough fireplace cleaning may be most of the fix. We'll tell you if that's the case rather than selling a bigger repair.

How a draft repair visit works

From first call to a fireplace that draws

  1. Tell us what you're seeing

    When you get in touch, describe when the smoke appears, whether it's a wood or gas fireplace, and anything that makes it better or worse. That points us toward likely causes before we arrive.

  2. Inspect the firebox, damper and flue

    We check the damper's operation, the firebox and smoke chamber, and the flue itself, using a camera where we need to see what's inside the chimney.

  3. Check the top and the house

    We look at the cap and chimney top, then consider the house side: exhaust fans, other appliances and how much air reaches the fireplace.

  4. Explain the cause and the options

    You get a plain explanation of what's restricting the draft and what it takes to correct it, with a free estimate before any repair work starts.

  5. Make the repair

    Depending on the cause, that can mean damper repair or replacement, smoke chamber repair, clearing a blockage, adding or replacing a chimney cap, flue liner work, or cleaning.

  6. Confirm it draws

    Where it's safe to do so, we verify that smoke is moving up the chimney and not into the room.

Wood, gas and electric units draft differently

Wood-burning fireplaces depend entirely on natural draft, so they show problems most clearly. Gas fireplaces vent differently depending on the type. A vented gas unit with a poor draft can let exhaust into the room, which is a reason to have it looked at promptly. We handle gas fireplace and gas appliance work as well as wood-burning fireplaces, and we work on all major brands. If you're weighing a change in fuel, our guide to gas vs wood burning fireplace covers the trade-offs.

Electric fireplaces have no flue and no draft, so a unit that isn't working right needs electric fireplace repair instead.

If smoke is filling the room right now

Stop adding fuel, open windows, and keep people and pets away from the smoke. If anyone has a headache, dizziness or nausea, get everyone outside and call emergency services. Once everyone is safe, call us. We accept emergency calls.

Booking fireplace draft repair

Same-day visits are available where the schedule allows, and 24-hour service runs Sunday–Friday. We take homeowner calls as well as commercial and property-manager work. If the inspection turns up damage beyond the draft problem, such as cracked firebox brick or a failing damper frame, we'll explain how our fireplace repair service addresses it. Call or request an estimate to get started.

Symptoms that lead here

Know the symptom? Start there.

These guides explain the likely causes and what you can safely check before a visit.

Fireplace Draft Repair: common questions

Can I fix a smoky fireplace just by cracking a window?

Sometimes, as a stopgap. If the house is short on air because of exhaust fans or a tight building envelope, an open window can restore the draft while the fire burns. It won't fix a stuck damper, a blocked flue or a damaged smoke chamber, so if the smoke keeps coming back, have the cause found.

Why does my fireplace smoke only when I first light it?

A cold flue is full of heavy, cool air that resists the rising smoke until it warms up. A damper that isn't fully open or a house that's pulling air in through the chimney makes it worse. If start-up smoking is new or getting worse, a restriction or damper problem is worth checking.

Do you take emergency calls for smoke coming into the house?

Yes. Emergency calls are accepted, and 24-hour service runs Sunday–Friday. If smoke is filling the room, stop the fire, open windows and get everyone outside if anyone feels unwell, then call 911.

Can a gas fireplace have a draft problem?

Yes. Vented gas fireplaces rely on proper venting to carry exhaust out, and a blocked or poorly drafting vent can push combustion gases into the room. We service gas fireplaces and gas appliances and can check the venting as part of the visit.

Will cleaning the chimney fix my draft?

Sometimes. Heavy soot, creosote or debris narrows the flue and slows the draft, and cleaning restores the full opening. If the cause is the damper, the smoke chamber, the cap or house air pressure, cleaning alone won't solve it. The inspection tells us which it is.

Do you handle draft problems in rental or commercial buildings?

Yes.

Free Estimates

Talk to us about fireplace draft repair

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