Service · Toronto & GTA
Fireplace Restoration
Firebox repair, smoke chamber pargeting, damper replacement, and heritage brick matching. If smoke is entering the room, the cause is diagnosable and fixable.
A fireplace that smokes into the room isn’t usually a draft problem, it’s a smoke chamber problem, a throat geometry problem, or a damper failure. The distinction matters because each has a different repair.
The smoke chamber is the pyramidal cavity above the firebox throat that compresses combustion gases before they enter the flue. In Victorian-era Toronto fireplaces, this space is often corbelled brick, step-stacked rather than parged, which creates rough surface area that cools gases and disrupts draw. When the parge coat that smooths the chamber cracks or spalls, the problem accelerates.
Firebox deterioration, spalling firebrick, cracked joints, shifted refractory panels, is a separate issue that affects structural integrity and, if ignored, can allow heat transfer to adjacent framing. Both are addressable without replacing the fireplace.
- Smoke entering the room during or after fires, even with the damper fully open
- Visible cracking or spalling of firebrick inside the firebox
- Black staining on the breast of the fireplace above the opening, smoke rollout
- Damper that won’t fully open, close, or seal, allowing conditioned air to escape
- Loose mortar or brick material falling into the firebox from above
- Odour from the fireplace when it isn’t in use, often a failed damper seal
- Home inspection flagging firebox condition or draft performance
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We diagnose before we quote. Smoke entry has several distinct causes and each one has a different fix.
Diagnosis first
We inspect the firebox, smoke chamber, throat, and damper before quoting any work. The cause of smoke entry is documented. Draft issues from negative house pressure are a different problem entirely.
Smoke chamber parge
Where the parge coat has failed, we apply a high-temperature refractory mortar to all chamber surfaces, restoring the smooth profile required for proper gas compression and draw.
Firebox repair
Spalled or missing firebrick is replaced with refractory brick matched to the firebox dimensions. Joints are repointed with mortar rated for sustained high-temperature exposure.
Damper and draw test
Damper plates that are warped, seized, or non-sealing are replaced. On completion, we run a draw test and smoke test before sign-off.
Restoration warranty
Firebox and smoke chamber work
Liner warranty
When installed with restoration
Smoke in room at completion
Draw tested before sign-off
In almost all cases, yes. The cause is usually one of three things: a failed smoke chamber parge coat, a damper that’s not fully opening, or a negative pressure condition in the house. We diagnose which before recommending any work. Negative pressure is a different fix from parge coat repair, and conflating the two is a common waste of money.
That is explicitly the goal. We match firebrick as closely as possible to existing material and use mortar profiles consistent with the period construction. The smoke chamber parge is not visible from the firebox. The restoration should be invisible from the room.
The parge coat is a smooth refractory mortar finish applied to the inside surfaces of the smoke chamber. It degrades from thermal cycling, repeated expansion and contraction from heating and cooling cracks the surface. Once cracked, the rough corbelled brick below disrupts gas flow, reducing draw. We re-apply using a castable refractory mortar rated for the application.
If there is no liner, or the existing clay tile is cracked or offset, Ontario Building Code requires one for any operating fireplace. We assess this during the diagnostic visit and include it in the scope if required. Installing a liner at the same time as firebox restoration avoids a second mobilization cost.
If smoke is entering the room, the cause is diagnosable.
Request an AssessmentOr call (647) 678-6456 · Mon–Sun 9am–8pm