Fire cleanup in Almaty

How Fire Cleanup Differs from Regular Deep Cleaning

In our practice, profi-clean cleaners visit properties after fires every month, and the first thing we explain to the client is: deep cleaning and fire cleanup are two fundamentally different services. Regular cleaning washes away dust and dirt, while post-fire cleanup neutralizes chemically aggressive compounds, soot, and smoke residue that penetrate the micropores of materials. Let’s break down the key differences so you understand why a mop and vacuum cleaner won’t suffice here.

Composition of Contaminants: Household Dust vs. Toxic Soot

During a standard deep clean, we deal with dust, pet hair, sand, and grease stains—all of which are removed with alkaline or neutral cleaning agents in one pass. After a fire, surfaces are left with soot (fine carbon particles), smoke residue (a mixture of soot and volatile organic compounds), and a film from the combustion of synthetics—plastic, foam, particleboard. These substances are chemically active: they react with paint, varnish, and wallpaper, embedding into the structure within 6–12 hours. Regular dish soap or chlorine bleach is useless here—they fix the soot in the pores, making stains permanent. At our Almaty sites, we use specialized solvent-based formulations from Kiehl and Sodasan, which break down the carbon bonds of smoke residue at a molecular level. If more than a day has passed since the fire, restoring white walls or light-colored furniture without professional chemicals is impossible—the soot particles fuse permanently with the lacquer coating.

Depth of Penetration: Surface Film vs. Capillary Absorption

During a deep clean, contaminants are on the surface—on the floor, countertop, glass. After a fire, smoke penetrates the hardest-to-reach places: behind baseboards, inside ventilation ducts, under stretch ceilings, into gaps between parquet boards. In Almaty, where old housing stock (Center, Tastak, microdistricts “A”–”G”) often features wooden floors and loose plaster, the smoke suspension absorbs 3–5 mm deep into the material. Regular wet cleaning only washes off the top millimeter, leaving the smell of smoke and toxins inside. Our technology involves treatment with a steam generator at 140 °C, applying an alkaline solution under pressure—this flushes soot out of the capillaries. If this step is skipped, the smell of smoke will reappear in the room a month after cleaning: air humidity activates the compounds remaining in the pores. In our practice, there was a case on Abay Avenue where, after a “regular deep clean,” the smell returned in three weeks—we had to remove the top layer of plaster and treat the walls again.

Need for Dismantling and Opening Structures

A deep clean does not require dismantling—open surfaces are washed, furniture is moved, carpets are beaten. After a fire, a quality cleanup is impossible without partially disassembling structures. Soot accumulates behind wall-mounted cabinets, under raised floors, inside exhaust ducts, and in window sill cavities. At Almaty sites (especially in “Panel-6” series houses with hollow partitions), we often open suspended ceilings and remove wall cladding—only then can we reach the layer of soot that has settled in the cavity. Without dismantling, the smell of smoke persists for years, especially in summer when air heating activates the hardened resins in the soot. We warn clients in advance: if ventilation ducts are not opened, the smell will return in the heat after six months—this is not a cleaning defect, but the physics of particle settling in enclosed spaces.

Equipment: Household Vacuum vs. Industrial HEPA System

For a deep clean, a vacuum cleaner with a dust bag and a regular mop are sufficient. After a fire, household appliances are strictly prohibited: they allow micro-particles of soot (size 0.1–10 microns) back into the air, spreading toxins throughout all rooms. profi-clean uses industrial vacuum cleaners with HEPA H14 filtration, which trap 99.995% of particles up to 0.3 microns in size. Soot is carbon dust; it is electrostatically charged and sticks to the plastic inside a regular vacuum cleaner; when turned on next time, it is expelled into the room. At our Almaty sites, we use three-stage filtration: a cyclone pre-separator + HEPA H14 + a carbon post-filter. Without this, cleaning turns into spreading soot around the apartment—the client breathes in combustion products for another week after “washing” the walls.

Health Risks: Allergies vs. Chemical Poisoning

General cleaning is safe with standard ventilation and household chemicals. Working indoors after a fire without PPE is a direct risk of poisoning: soot contains polycyclic aromatic hydrocarbons (PAHs), benzene, and formaldehyde, which are released when synthetics (linoleum, plastic, foam rubber) burn. Inhaling these compounds for even an hour causes headaches, nausea, and irritation of mucous membranes. Our cleaners on sites in Almaty work in respirators with A1B1E1 filters and protective suits. If you try to clean it yourself, be sure to use an industrial respirator (not a medical mask), nitrile gloves, and goggles. Regular clothing after such cleaning must be disposed of: PAHs do not wash out completely and remain in the fabric. During one of our April call-outs on Zharokova Street, a client who tried to clean soot without protection ended up in toxicology with respiratory tract edema — after that, we always insist on professional treatment with certified protective equipment.

Main types of post-fire contaminants and methods for their removal

After a fire, a room contains not one, but three fundamentally different fractions of contaminants — and each must be removed using its own method. On the sites where profi-clean works in Almaty, we see owners trying to wash everything with one solution, only for the smell to return a week later and yellow stains to appear on the walls. Let’s break down the three main types of contaminants and how they are professionally removed.

Thermal damage and soot: the difference between dry soot and oily soot

Soot is not a homogeneous substance, but a mixture of carbon particles that, depending on the combustion temperature, can be dry (temperature above 600 °C) or oily (smoldering at 200–400 °C). Dry soot is a fine dust that settles on vertical surfaces and embeds itself in the pores of plaster and wallpaper. Oily soot forms when synthetics, plastic, or linoleum burn — it is sticky and penetrates deeply into paint coatings and wood. At profi-clean, on sites in Almaty, we first determine the type of soot with a test wipe: if the cloth glides, the soot is dry; if it smears and drags, it is oily. We remove dry soot with an industrial vacuum cleaner with a HEPA filter and a dry natural rubber sponge (it absorbs carbon without smearing). Oily soot is removed only chemically: we apply an alkaline solution based on potassium soap (Kiehl), let it sit for 5–7 minutes, and rinse with a hot water extractor. A common mistake: trying to wash dry soot with water — it turns into mud that then has to be sanded off the surface.

Soot and its penetration into finishing materials

Soot is a mixture of carbon particles with products of incomplete combustion of resins, plasticizers, and paint coatings. It doesn’t just sit on the surface but penetrates deep: into drywall — 2–3 mm, into untreated wood — up to 5 mm, into porous plaster — through the entire layer thickness. In our orders in Almaty, the most difficult case is soot on textured “bark beetle” plaster: its relief collects particles in the grooves, and a regular brush can’t reach them. For such surfaces, we use the absorption method: we apply a special paste based on cellulose and hydrogen peroxide, which draws soot out of the pores in 20–30 minutes, then rinse with an extractor. On glossy surfaces (tiles, laminate, plastic), soot is removed with a neutral detergent and microfiber. Actionable insight: on drywall after soot removal, be sure to check the wall’s moisture level — if the material has absorbed water, without antiseptic treatment, mold will appear within a month, and the wall will have to be replaced.

Grease films from burning synthetics and plastic

When modern materials (polyester, acrylic, PVC, polyurethane foam) burn, they produce not soot but fatty aerosols — tiny droplets that cool and coat all surfaces with a thin, sticky film. This film is invisible to the eye but feels greasy to the touch, and it is precisely this that creates that lingering “chemical” burning smell that persists for months. We had a case in an apartment in Almaty after a polyurethane foam sofa caught fire: the client washed the walls three times with water and powder, but the smell returned after two days because the film was not removed, only smeared. To remove fatty films, we use only professional solvent-based degreasers (Sodasan Industrial Degreaser) — they emulsify the oily layer, which is then washed away with hot water under pressure. Expert recommendation: on kitchen units and plastic windows after film removal, be sure to apply a protective compound with a UV filter — without it, the surface yellows faster in the sun, and within six months, the difference between the treated and adjacent area will become noticeable.

Burning Smell: Chemical Nature and Neutralization Methods

The burning smell is not a “spirit” in the air but volatile organic compounds (VOCs) that adsorb into porous materials: wallpaper, wood, textiles, drywall. Phenol and cresol molecules (combustion products) bond with cellulose and polymers on a chemical level — simple airing does not help because the compounds are released for years with changes in temperature and humidity. At profi-clean on sites in Almaty, we use a three-stage neutralization: first ozonation (ozone oxidizes VOCs into harmless compounds), then application of a water-based catalytic neutralizer (it reacts with residual molecules and turns them into salts), and final treatment with UV lamps to destroy the smell in hard-to-reach places. Actionable insight: do not use air fresheners or candles to mask the burning smell — they do not remove VOCs but mix with them, creating toxic secondary compounds that, when inhaled, irritate mucous membranes twice as much.

Secondary Contamination: Mold and Rust from Firefighting Water

The least obvious consequence of a fire is not soot, but the water used to extinguish it. It seeps under baseboards, into floor screeds, behind drywall, and leaves two types of contamination: rust from metal structures (rebar, pipes, door frames) and biological damage (mold and mildew). In Almaty, where humidity in basements and on first floors is higher than the city average, mold after firefighting appears as early as day 3–5 if forced drying is not started. In our practice, on post-fire sites, we always first measure wall and floor moisture with a moisture meter — if the reading is above 18%, we run heat guns and dehumidifiers for 48 hours. Rust on tiles and plumbing is removed with orthophosphoric acid (5–7% solution); on wooden surfaces, only by mechanical sanding, because the acid corrodes the wood structure. Expert recommendation: mold on drywall after firefighting cannot be removed with bleach — it only goes away with replacement of the affected area, so before drying, immediately cut off the bottom 10–15 cm of the wall, otherwise in a month you will have to replace the entire sheet.

Can You Remove the Burning Smell Yourself: Risks and Mistakes

At first glance, it seems that a draft and a couple of damp cloths will solve the problem. But on sites where we have worked, self-directed soot removal most often ends in overspending and lost time. Let’s break down why home methods do not work and what the risks are.

Why the Burning Smell Does Not Air Out with a Draft

Smoke after a fire is not a gas but a suspension of solid soot particles measuring 0.1–1 micron. This fraction does not obey the laws of diffusion: it does not “fly away” with the air flow but settles on all surfaces due to Brownian motion and electrostatics. Almaty cleaners at profi-clean measured the residual contamination level after 12 hours of airing — the soot concentration on walls and ceilings decreased by only 8–12% of the original. The remaining part penetrates into the pores of plaster, concrete, and drywall to a depth of 3–5 mm. A draft blows away only what has not yet settled — the bulk remains inside the material and, with increased humidity or temperature, re-enters the air.

Which Soot Particles Remain on Surfaces and Inside Walls

After a fire, three fractions of soot form indoors, and each behaves differently. Coarse soot (from 10 microns) — visible black deposits on furniture and floors — can be washed off with soapy water but leaves a greasy film that continues to smell. Fine soot (0.5–5 microns) — which penetrates wall pores and textiles — cannot be removed without special chemical compounds with low surface tension. Ultrafine soot (less than 0.3 microns) — lingers in the air for weeks and settles in the lungs; it is captured by HEPA filters of class H13 and higher. In our orders for apartments after kitchen fires in 1-464 series houses (panel buildings, Almaty), we found soot on the reverse side of stretch ceilings and inside ventilation ducts — places an ordinary cloth simply cannot reach.

Mistakes when using folk remedies and household chemicals

The most common mistake is treating walls and furniture with vinegar or bleach. Acetic acid reacts with the alkaline components of soot, forming acetates — volatile salts that create a new chemical odor mixing with the smell of smoke. At a site in the “TaUgul” microdistrict, after such treatment, profi-clean cleaners recorded a persistent “vinegar-smoke” trail that required triple washing with a neutralizing compound with a pH buffer. Bleach, on the other hand, reacts with organic residue from smoke, releasing organochlorine compounds — which are toxic when inhaled. Household stain removers like Vanish or Amway Home are not designed for oily soot: they wash off the top layer but leave a greasy base that, when heated by radiators, starts to smell again.

When DIY cleaning can damage finishes

Mechanical friction is the second most common mistake. Soot contains abrasive carbon particles with a hardness of 1–2 on the Mohs scale. When vigorously wiping painted walls or lacquered furniture, these particles act like sandpaper: they leave micro-scratches that later trap new dirt. On matte acrylic ceilings (a common choice in new Almaty buildings), soot embeds so deeply that trying to wash it off with a sponge and baking soda leaves white streaks that cannot be removed without a full repaint. Another typical scenario is carpets and carpeting. Home steam cleaners with water filters (Karcher, Thomas) push soot deeper into the pile rather than extracting it: water forces particles to the carpet base, from where they can only be removed with an industrial extractor at 80–100 bar pressure. In our practice at sites in the “Nurly Tau” residential complex, after DIY carpet cleaning, the smoke smell returned within 2–3 days — moisture activated the remaining micro-particles.

Specifics of post-fire cleaning in Almaty: climate and building types

The Almaty microdistrict “Samal” with panoramic windows and a Stalin-era building in the center with wooden floors — the consequences of the same fire look different and are eliminated differently. Climate and building type dictate cleaning methods.

How humidity and temperature fluctuations affect soot and smoke residue

Almaty has a sharply continental climate with humid springs and dry summers — this changes the behavior of contaminants. Our practice shows: at humidity above 65% (March-April and October-November), soot absorbs moisture from the air, turning into a sticky paste that penetrates deeper into plaster and wood pores. During a dry July fire, soot remains on the surface and washes off faster. The difference in cleaning time per square meter of walls is up to two times. Temperature fluctuations in the off-season (from +5°C at night to +25°C during the day) cause condensation on cooled structures — moisture mixes with soot and seeps into panel joints and under baseboards. Therefore, when cleaning premises after a fire in Almaty, we always measure indoor humidity with a hygrometer and, if the reading is above 60%, use an enhanced drying cycle with heat guns before applying absorbents. Without this step, the smoke smell returns within a week — moisture “pushes” soot particles back to the surface.

Specifics of old buildings (Stalin-era, Khrushchev-era) vs new constructions

Stalinka apartments in central Almaty (Gogol, Kunaev streets area) have wooden floor beams and lime-sand plaster — a sponge for soot. On buildings constructed in the 1950s, we encounter soot penetrating 3-5 mm deep into the plaster, making mechanical cleaning without removing the layer ineffective. In Khrushchyovka apartments in the “Tastak-1” and “Orbita” microdistricts, the problem lies in panel joints — during a fire, smoke is drawn into inter-panel voids, and the smell later comes from neighboring apartments. New buildings (Akbulak residential complex, Grand Alatau) with plasterboard partitions and stretch ceilings are a different story: soot is not absorbed but settles on all horizontal surfaces, including hidden cavities behind false walls. There, we have to dismantle part of the structure to treat the internal cavities with ozone. In our practice, cleaning a stalinka takes 30-40% more time than a new building of the same area, due to the need to remove a layer of plaster in the kitchen.

The problem of apartment buildings: common ventilation ducts

In any Almaty apartment building — whether it’s a 1-464 series building in “Aynabulak” or a business-class residential complex on Dostyk — ventilation ducts connect apartments along the riser. During a fire, smoke is drawn into the ventilation shaft and spreads 5-8 floors upward. Even if the source is contained in one apartment, the smell of burning appears at neighbors’ apartments above within 2-3 hours. A typical mistake residents make is sealing the ventilation with tape: this doesn’t help, as smoke penetrates through micro-cracks in the ducts. When cleaning premises after a fire in Almaty, we always inspect the shafts with an endoscope for soot and, if contaminated, treat them with an antibacterial solution using a dry fog generator. If this is not done, the smell will return every time the exhaust hood is turned on in a neighboring apartment — and complaints from neighbors are guaranteed.

How to prepare a room for cleaning after a fire

While our cleaners are on their way to the site, the client can do several things that will reduce the overall work time and lower the risk of additional damage. At profi-clean, we have compiled a memo of four mandatory steps — they should be completed before our arrival.

Initial assessment of ventilation and electrical wiring

Before entering the room, check that the electricity is turned off at the panel — during a fire, wire insulation often melts, and turning on the switch can cause a short circuit. Open all windows wide, but only if there is no rain or strong wind outside that could spread soot to adjacent rooms. In Almaty apartments with plastic double-glazed windows, we recommend removing mosquito nets — up to 30% of fine particulate deposits settle on them, and a draft blows them outside rather than back into the room. If there are working split systems in the room, do not turn them on: soot clogs the drainage and evaporator, and repairing the air conditioner after such use costs more than the cleaning itself.

Collecting valuables and documents

First, remove passports, money, electronics, and property documents — even if they seem clean, soot particles penetrate the micro-pores of paper and plastic, making them harder to clean after a week. Remove covers from clothing and textiles that were not damaged by fire — they are sent to dry cleaning separately, and in the room they will only collect extra soot. Do not try to wipe soot off furniture with a damp cloth: water “seals” the deposit into the surface, and later our cleaners have to use more aggressive chemicals that can damage the varnish coating. Leave items on the balcony or in the hallway — smoke has barely penetrated there.

Dismantling items that need replacement

If wallpaper is blistered or melted, remove it yourself before the masters arrive: damp condensation often remains underneath, which can trigger mold within 48 hours. For carpet coverings saturated with soot and firefighting water, it is better to immediately cut out the affected areas — they cannot be restored, and their removal speeds up floor treatment. In Almaty homes with stretch ceilings, check if the fabric has sagged due to temperature changes: if there is sagging, call a specialist for dismantling, otherwise the ceiling may tear from equipment vibration during cleaning. Remove and discard plastic blinds and curtain rods — oily soot settles on them, and cleaning them costs more than buying new ones.

Organizing access and logistics for cleaners

Clear pathways of movable furniture — this reduces cleaning time by 20-30% as technicians don’t have to navigate around obstacles. Pack small items (dishes, books, decor) into boxes and move them to the hallway or an adjacent room: each item is handled manually, and scattered belongings lengthen the work shift. If there are pets in the home, temporarily relocate them to neighbors or relatives — the smell of chemicals and the noise of industrial vacuums stress animals, and soot can settle on their fur. Our advice: lay old sheets or cardboard from the entrance to the work area — this prevents you from tracking soot into clean rooms, and you won’t have to wash the hallway again after cleaning.

Professional Products and Equipment: What Really Works

Standard household chemicals and vacuum cleaners cannot handle soot, grime, and toxic gases after a fire — professional-grade solutions and industrial equipment are required. We use several classes of products and machines, each tailored to a specific type of contamination.

The Role of pH-Active Cleaners: Acidic vs. Alkaline Formulations

Soot and grime after a fire have different chemical natures depending on what burned: wood, synthetics, plastic, or oils. Alkaline cleaners (pH 10–13) work against greasy soot from synthetic materials — they saponify oily films and turn them into a water-soluble emulsion. Acidic formulations (pH 2–4) are effective against mineral deposits and carbon residue from burning plastic — they dissolve carbonate and oxide crusts. At profi-clean, we use the professional Kiehl line with pH differentiation: for walls and ceilings after wood smoldering, an alkaline concentrate is used; for glass and tile, an acidic one. Our practice shows that universal “2-in-1” formulations leave streaks on porous surfaces — so on-site, we always have two canisters and pH test strips to check before application.

Extractors and HEPA Vacuums: Why a Standard Vacuum is Dangerous

Soot particles sized 0.1–1 micron (PM0.1–PM1) are not captured by household filters and are expelled back into the air, settling in the lungs. Industrial extractors — such as our machines with three-stage HEPA H13 filtration — capture 99.97% of particles down to 0.3 microns, including fine soot and mold spores. We use a combination: a dry vacuum for initial collection, then a wet extractor applying solution at pressures up to 6 bar — it washes soot out of concrete and wood pores. Without HEPA filtration, you simply redistribute the soot around the room; on every job, we carry spare filters, which are changed after sites with heavy smoke damage.

Hypoallergenic Sodasan Chemicals: Safety for Residents and Pets

After a fire, the space becomes chemically vulnerable: residual soot reacts with aggressive cleaning agents, releasing volatile compounds. We chose the plant-based Sodasan line — they contain no chlorine, phosphates, or synthetic fragrances that mask odors rather than neutralize them. At sites in Almaty with children or dogs, profi-clean cleaners use these formulations: they are biodegradable within 28 days and leave no film on surfaces. Moreover, Sodasan’s effectiveness against soot is comparable to major brands’ alkaline chemicals — the only difference is speed: on greasy deposits, the plant-based concentrate takes 10–15 minutes longer, but without the risk of allergies for the client.

Ozonators and Photocatalytic Filters: How Odors are Removed at the Molecular Level

An ozonator is the only device that oxidizes odor molecules into carbon dioxide and water, without masking them. At profi-clean, we use industrial ozone generators with an output of 5–10 g/h — in 30–40 minutes of treatment in an empty room, ozone destroys up to 95% of volatile organic compounds, including phenols from burnt plastic. However, there is a catch: ozone is hazardous to breathe, so treatment is only carried out after furniture removal and with ventilation turned off. An alternative is photocatalytic filters with a UV lamp: they break down odors on a titanium dioxide surface without ozone, but slower — for a 30 m² room, it takes up to 4 hours. On sites with heavy charring, we combine both methods: first ozonation, then photocatalysis for final polishing.

Cleaning Ventilation and Air Conditioners After a Fire: The Hidden Source of Odor

Ventilation ducts and the indoor unit of a split-system accumulate soot and grease deposits — after a fire, they become a constant source of odor that returns 1–2 days after cleaning. For cleaning, we use steam generators with an alkaline solution supply at a pressure of 8 bar, followed by vacuum extraction through a HEPA filter. On air conditioners, we additionally clean the drainage system and the fan impeller — soot settles on them as the hottest point. In our orders in Almaty over the past year, every third odor recurrence was linked specifically to uncleaned ventilation, so we now include its inspection in the standard protocol after a fire.