How to Remove Smoke Smell From a Home (After Tenants or a Fire)

Smoke smell in a property — whether from cigarette smoking by previous tenants, a cooking fire, a bushfire event, or a structural fire — is one of the most persistent and difficult odours to fully eliminate. It's also one of the most commonly underestimated remediation jobs.

The reason smoke smell is so difficult is the chemistry. Smoke consists of fine particles and volatile compounds that penetrate deeply into every porous material they contact: plasterboard walls, ceiling cavities, timber frames, carpet backing and underlay, curtains, upholstery, and even concrete. The odour-causing compounds bond to these materials and continue to off-gas for months or years if not properly addressed.

Surface cleaning alone — wiping walls, shampooing carpet — removes a portion of the contamination but leaves the rest. Understanding what actually works — and the sequence to do it in — is what determines whether the smell is genuinely eliminated or just temporarily suppressed.

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Cigarette Smoke vs Fire Smoke: Different Problems

Cigarette smoke (from tenants who smoked indoors): Years of cigarette smoking deposits a yellow-brown layer of tar and nicotine compounds on every surface. Walls, ceilings, window glass, and light fittings become discoloured. The compounds penetrate into paint and plasterboard. The smell is caused by these compounds continuing to off-gas and by compounds embedded in soft materials.

Kitchen fire or small fire smoke: High-heat combustion smoke. The particles are finer than cigarette smoke and penetrate more deeply in a short time. Soot deposits on surfaces. The acrolein and other combustion products are more acutely unpleasant than cigarette odour.

Bushfire and ash smoke: More particulate-heavy. Less tar/nicotine than cigarette smoke. Can penetrate through gaps in building fabric into roof cavities and wall cavities.

The principles of remediation are similar for all types, but the intensity and specific products needed differ.

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What Doesn't Work (Common Mistakes)

Masking with air freshener or fragrance: The most common response and the least effective. Fragrance covers the smell temporarily — the smoke odour returns as soon as the fragrance dissipates, sometimes within hours. This approach never eliminates the source.

Painting over without cleaning first: Painting over smoke-damaged walls without proper cleaning and a sealing primer results in the odour compounds migrating through the new paint layer within weeks. The paint traps the smell temporarily but doesn't seal it indefinitely.

Shampooing carpet without treating the underlay: Carpet shampooing cleans the surface fibres. Smoke compounds in the carpet backing and underlay are not addressed by shampooing — the smell comes back from the untreated layers.

Airing out and hoping: Ventilation removes airborne particles and helps, but the compounds bonded to surfaces continue off-gassing indefinitely. Ventilation alone never eliminates embedded smoke smell.

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The Correct Remediation Sequence

Effective smoke smell removal requires a systematic approach that addresses every contaminated material in the correct order.

Step 1: Assess the Extent

Before starting, assess what you're dealing with:

• How long was smoking occurring, or how severe was the fire/smoke event?
• Which materials are affected? (walls, ceiling, carpet, curtains, cabinetry)
• Is the smell throughout the property or localised?
• What is the condition of the HVAC system? (smoke travels through ducts)

For severe cigarette smoking (multiple years, heavy smoking indoors), full remediation is a significant project. For a recent, light fire event, the scope is smaller.

Step 2: Ventilate and Remove

Open all windows and doors. Set up fans to create cross-ventilation — moving air through the property and out.

Remove and dispose of:

• Curtains and blinds (soft materials absorb smoke compounds heavily and are rarely worth cleaning)
• Carpet and underlay in a heavily smoke-damaged property (carpet can be cleaned for light cases — see below)
• Any soft furnishings that are heavily impregnated (cushions, upholstered furniture in severe cases)
• Contents of the property that have absorbed significant smoke odour

Step 3: Clean All Hard Surfaces

Every hard surface in the property needs to be cleaned before any paint or sealer is applied.

For cigarette smoke (nicotine and tar deposits):

Nicotine deposits on surfaces are alkaline — they respond best to alkaline cleaning solutions.

• Sugar soap (Selleys or similar — available at hardware stores): an alkaline cleaner specifically effective for nicotine deposits. Mix to a strong solution, apply to walls and ceilings, scrub, and wipe clean. This is the standard product used by painters and remediation companies for cigarette-damaged properties.
• Apply in sections, rinse with a clean damp cloth, and dry.
• Expect to do walls and ceilings — both absorb nicotine significantly.
• Wipe light fittings, switch plates, door frames, window frames and sills.

For fire smoke (soot and combustion deposits):

• Dry soot sponges (also called chemical sponges — available from restoration supply companies) are used first, before any wet cleaning. These lift dry soot from surfaces without smearing it.
• Then wet clean with a TSP (trisodium phosphate) solution or a commercial smoke-cleaning product from restoration suppliers.
• Rinse thoroughly.

Step 4: Clean the HVAC System

Air conditioning ducts and returns are a significant smoke reservoir. In a property with years of indoor smoking, the ductwork contains significant contamination that will continue to distribute odour every time the system runs.

HVAC duct cleaning is a specialist service. Professional duct cleaners use high-powered vacuums and brushes to remove contamination from ductwork. For significant smoke damage, this is non-negotiable — surface cleaning of the property while the HVAC continues to distribute smoke compounds defeats the purpose.

At minimum: replace all air filters, clean the return air grilles and supply registers, and have the system inspected.

Step 5: Address Carpet and Soft Furnishings

Carpet (light to moderate smoke damage): Professional hot water extraction (steam cleaning) with an appropriate pre-treatment. For cigarette smoke, a pre-spray of alkaline carpet cleaner, followed by extraction, removes a significant portion of surface contamination.

Carpet (heavy, multi-year smoke damage): Steam cleaning improves the situation but rarely eliminates the smell. The smoke compounds in the backing and underlay are not adequately reached by carpet cleaning. In this case, carpet and underlay replacement is the only genuine solution.

Ceiling: Ceilings absorb smoke heavily and are often overlooked. A ceiling that smells of smoke will defeat all other remediation. Clean with sugar soap and water solution, allow to dry completely.

Step 6: Apply Odour-Blocking Primer and Repaint

This is the step that seals the residual compounds in the walls and ceiling surfaces.

Odour-blocking primer: A specialised primer (Zinsser BIN shellac-based primer is the industry standard in Australia for smoke damage; Kilz Original is another effective product) is applied to all walls and ceilings after cleaning. These primers seal the surface and encapsulate residual odour compounds, preventing them from off-gassing through the new paint layer.

Standard acrylic primers do not perform this function adequately for smoke-damaged surfaces. Shellac-based primers are specifically formulated for odour sealing.

Apply at least one full coat of the sealing primer. Allow to cure. Then apply standard topcoat paint as normal.

Without this sealing step, smoke smell will penetrate through new paint within weeks to months.

Step 7: Ozone Treatment (Optional but Effective)

Ozone generators produce ozone (O₃), which oxidises organic compounds — including smoke odour molecules — on contact. Professional ozone treatment is used by remediation companies specifically for smoke odour.

Important: Ozone treatment requires the property to be completely unoccupied — no people, pets, or plants. Ozone at remediation concentrations is hazardous to breathe. Treatment runs for several hours, then the property is ventilated thoroughly before re-entry.

Ozone treatment is particularly effective for reaching compounds that surface cleaning and paint sealing can't address — in wall cavities, roof spaces, and HVAC ductwork.

For severe smoke damage, professional ozone treatment after the cleaning and painting steps significantly improves the outcome.

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For Rental Properties: Documentation and Bond

If a rental property has been smoked in against the lease terms, the remediation cost is recoverable from the tenant's bond — but you need documentation:

• A pre-tenancy condition report confirming the property was smoke-free
• Photographic evidence of smoke damage (yellow walls, stained ceilings, nicotine deposits on windows)
• Quotes and receipts for remediation work

Without documentation of the pre-tenancy condition, establishing that the damage was caused during the tenancy is harder. Always take comprehensive condition report photos at the start of every tenancy.

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Smoke damage remediation is specialist work for severe cases. At PF Cleaning, we handle smoke cleaning for mildly affected properties and can refer you to specialist remediation companies for severe smoke damage. book a professional deep clean in Adelaide to discuss your situation.

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Written by Victor Jacon — Master Cleaner & Home Detailing Specialist, Founder of PF Cleaning Adelaide.