A typical scenario (an illustrative story based on common situations, not a review from a specific customer)

A small shop in Pak Kret and a regular client who asked, "Is there a smell in here?"

Noi has run a small hair and nail salon in a shophouse in Pak Kret, Nonthaburi, for almost ten years. The shop has three styling chairs, two reclining shampoo basins, two manicure tables and one pedicure spa chair she bought the year before. The shop is small but tidy and always smells faintly of shampoo.

Late in the rainy season, water from the Chao Phraya River spilled into the soi. It rose about forty centimeters inside the shop and stayed for almost a week. Chair bases, basins, the lower towel cabinet and boxes of stock on the floor were all submerged. When the water receded, Noi and her two staff shoveled out the mud, scrubbed the floor with detergent, poured bleach over it, wiped the vinyl chairs until they shone and left the fans and air conditioner running for three days.

The shop looked ready. But on the first day back, a regular client sat down at the shampoo basin and quietly asked, "Is there a smell in here? Like towels left wet overnight." Another client who had booked a pedicure noticed yellowish stains around the rim of the foot spa and switched to a manicure only. Within two weeks Noi found small black spots under a styling chair cushion, a sour smell coming from a split seam in the vinyl, and towels that no longer smelled fresh even after washing.

What Noi experienced is very common. A beauty business sells cleanliness directly. After a flood, a salon needs more than looking clean. It needs a recovery done in the right order: removing damaged materials, cleaning, drying properly, disinfecting tools to salon standards, and finally dealing with germs and odors in the air and in hidden spaces. That last step is where professional ozone treatment fits in.

Why beauty salons, nail salons and barber shops face extra risk after a flood

Three factors make a salon more vulnerable than an ordinary home. First, the materials in a salon love moisture. Towels, capes, foam under vinyl upholstery, floor mats, foot scrubbing sponges, brushes and combs all absorb water and hold it for a long time. Second, salons are humid even on normal days. Shampoo basins, foot spas, facial steamers and floor drains keep indoor humidity higher than in a typical house. Third, many clients pass through and their skin is in direct contact with surfaces and tools: scalp, face, hands, nails and feet. Tiny nicks from cuticle work or shaving give germs an easier way into the body.

Skin and scalp fungi (ringworm and related infections)

The fungi that cause ringworm of the scalp, body and nails spread by direct contact and through shared items such as combs, brushes, clippers, towels, capes and headrests. A well-run salon normally keeps this under control, but after a flood the moisture trapped in fabrics and cushions helps these fungi survive longer. Typical signs are itchy red rings with clear edges, patchy hair loss, or nails that become thick, discolored and brittle. Children who come for haircuts and people with weaker immunity tend to catch these infections more easily.

Skin bacteria such as Staphylococcus

Bacteria that normally live on the skin and in the nose of many people can cause infection when there is an open wound: inflamed hair follicles after shaving or waxing, pimples filled with pus, or infections around the nail. In a salon that has just been flooded, mud and dirt left in chair crevices, tool drawers and clipper holders can become a reservoir for bacteria from sewage-contaminated floodwater, mixed with bacteria shed from clients' own skin.

Foot spas and pipes: the most overlooked spot

Pedicure chairs with whirlpool jets have internal pipes where water stagnates. Public health reports from other countries have linked leg skin infections among nail salon clients to foot spas that were not cleaned thoroughly inside, where germs formed a slimy biofilm. If floodwater reached the motor or drain line, dirt may remain inside even while the basin looks spotless, and water-loving bacteria such as Pseudomonas thrive there.

Airborne mold and musty odors from fabrics, cushions and ceilings

A shophouse closed behind a roller shutter for days after a flood becomes extremely humid. Mold grows on lower walls, under counters and behind cabinets, and an air conditioner that pulled in damp air carries spores and odor into its coil. Clients then breathe that air for the one to three hours they spend in the chair, and people with allergies, asthma or sinus problems can flare up even if nobody sees a single mold spot.

Who is most at risk in a salon that has not fully recovered

• Older clients, whose skin is thinner, whose wounds heal slowly and who often have conditions such as diabetes, which makes foot infections dangerous.
• Young children getting haircuts, who catch scalp ringworm more easily than adults.
• Pregnant women, whose immunity changes and who should avoid airborne mold and strong chemical odors.
• People with chronic illness, including diabetes, kidney disease, people on immune-suppressing medicine, and those with allergies or asthma.
• Stylists and staff, who spend eight to ten hours a day inside, handle damp fabrics and tools all day, and are often the first to develop rashes or allergy symptoms.

If a salon owner or staff member who waded through floodwater develops a high fever, severe calf pain or red eyes, which can be signs of leptospirosis, or has diarrhea, vomiting, a spreading rash or a swollen, hot wound, they should see a doctor immediately and mention their flood exposure. Ozone treatment manages the environment. It is not medical treatment.

What happens if a salon reopens before recovery is finished

Health of clients and staff

A client who picks up a skin fungus or an inflamed bump after a shave rarely complains. They simply never come back. Staff who breathe spores every day may develop allergies or hand rashes and need sick days just when the shop needs them most.

Money

Salons live on daily income. Every extra week closed because the smell will not go away is income lost, on top of new towels, reupholstery, foot spa repairs and ruined stock. Cleaning repeatedly because the first attempt was done in the wrong order costs far more than doing it right once.

Reputation

Clients choose salons by online reviews. One line saying "the shop smells musty" in a neighborhood chat group can keep new clients away for months. Cleanliness is invisible, but clients sense it the moment they walk in.

Why the usual fixes do not finish the job

1. Polishing the vinyl but forgetting the soaked foam inside

Styling and shampoo chairs are usually vinyl over foam. The surface dries in minutes, but if floodwater reached the seat, the foam inside can hold water for days or weeks. It seeps out through seams and cracks as a sour smell and mold spots under the cushion. Wiping the outside only treats the symptom.

2. Washing every towel, then storing them in a damp cabinet

Washing all towels in hot water and tumble drying them is the right move. But putting them back into a wooden cabinet or shelf that was just flooded and is still damp means they reabsorb moisture and odor within days. The problem is the storage space, not only the towels.

3. Pouring strong bleach until the shop smells of chemicals instead of mildew

Bleach has a role on hard surfaces that are already clean, but it does not reach inside porous materials, and its harsh chlorine smell and residue on headrests can bother clients and irritate sensitive skin. Mixed with other cleaners, it can also release gases that harm staff.

4. Masking odors with air freshener and scented candles

Fragrance makes a shop feel inviting, but it only layers one smell on top of another. The mildew molecules and mold spores are still there. When the fragrance fades in the afternoon, the musty smell returns, and for clients sensitive to perfume the freshener becomes one more trigger.

5. Running the air conditioner to dry the shop without cleaning it

Air conditioning does lower humidity, but if the filter and coil pulled in spores and odor during the flood, the unit blows that smell back into the shop every time it runs. A salon with clean floors that still smells musty every morning when the AC switches on usually has its source right there.

WHD ozone disinfection: the finishing step that lets your salon reopen with confidence

The Residential and Building Ozone Disinfection service from World Health Disinfection (WHD) uses ozone gas (O₃), a form of oxygen with one extra atom and strong oxidizing power. Released into a closed space, ozone spreads throughout the room, including dead corners, under counters, behind cabinets, into chair crevices and other gaps that cloths and sprays cannot reach. It breaks down the cell structures of viruses, bacteria and mold, and breaks apart odor molecules instead of covering them. It then reverts to oxygen (O₂), so it leaves no chemical residue on chairs, fabrics or surfaces that clients touch.

According to the test results certified for the company by Thailand's Department of Medical Sciences and Intertek (UK), the WHD system eliminates viruses, bacteria and mold by 99.99%. Details are available on the certification page.

An important point to agree on: ozone treatment comes after mud removal, washing and drying. It does not replace those steps, and it does not replace disinfection or sterilization of tools that touch clients directly, such as scissors, clippers, nail clippers and files, which a salon must keep doing according to public health hygiene standards. Ozone handles germs and odors in the air and the whole space that hands and liquids cannot reach.

Safety: ozone treatment must take place in a closed space with no people, pets or plants inside. Everyone leaves the shop and nobody re-enters until the rest and ventilation period set by the team is complete. If the salon has living quarters upstairs or connects to a home, the team plans zones and seals air paths before starting.

How the WHD team works in salons, nail bars and barber shops

1. Survey and assessment. The team checks the flood line, damp materials and odor sources such as basins, towel cabinets and the AC, and advises what to discard.
2. Preparation. Cosmetics, chemicals, nail polish, food and plants are removed or sealed in closed containers. Shutters, windows and vents are closed, and the team confirms that no people or pets are inside.
3. Ozone release. Equipment is set for the size of the shop and ozone is distributed through the reception, shampoo zone, nail zone and storeroom.
4. Contact time. Ozone is left to act on germs and odor molecules for the set time, typically about 30 minutes per zone depending on size and severity.
5. Rest and ventilation. Ozone reverts to oxygen, the space is aired out, and the team checks it before telling the owner it is safe to go back in.
6. Handover and advice. The team gives guidance on humidity control, towel storage, AC care and daily cleaning so the problem does not return.

For ozone jobs of 15,000 baht or more, WHD includes a free medical-grade disinfectant spray for ongoing surface care. Salons can also look at Chemgene disinfectant for wiping surfaces between clients.

10 reasons a salon should finish flood recovery with ozone treatment

1. Ozone reaches places a cloth cannot. Under shampoo basins, behind retail displays, under the reception counter and around hydraulic chair bases are exactly where muddy water sat but hands cannot reach.
2. It removes musty odors at the source instead of masking them. Clients smell your signature shampoo again, not damp towels or bleach. See the ozone disinfection service.
3. No chemical residue on headrests and armrests, because ozone reverts to oxygen. That matters where faces and skin make direct contact.
4. Fewer mold spores in the air clients breathe during the one to three hours they spend on a cut, color or manicure.
5. Lower exposure for staff, who are in the shop every day and have the most contact with germs and odors.
6. Short downtime. About 30 minutes per zone plus rest and ventilation means the job can be scheduled on your weekly day off or after closing.
7. Certified testing by the Department of Medical Sciences and Intertek (UK), according to the test results certified for the company, which shows clients that you take their safety seriously.
8. It protects your investment in chairs, basins and furniture that can still be used, preventing mold from spreading until everything must be replaced.
9. A story you can tell clients. Saying the shop has been restored and ozone-disinfected after the flood builds far more confidence than "we cleaned up." Learn more about ozone treatment for buildings and shops.
10. Professionals handle all the safety steps, from assessment and sealing vents to timing and ventilation, so owners do not have to experiment with a machine they do not know. Contact us for advice.

Before and after: what a fully restored salon looks like

Example case: a Hat Yai barber shop where the smell would not leave

Example case (an illustrative scenario to explain the process, not a real customer review)

Ek runs a small barber shop on the ground floor of a shophouse in Hat Yai, Songkhla, with his family living upstairs. During a major end-of-year flood, water in the shop rose nearly half a meter for five days, submerging two hydraulic chairs and the bottom drawers of capes and towels.

Ek cleaned everything himself and threw away heavily soiled towels, but two weeks later a musty smell still greeted him every morning, and his daughter, who passed through the shop daily, developed a lingering stuffy nose.

When the team surveyed the shop, they found three main sources: a swollen plywood drawer unit that was still damp inside, the foam in one chair that had soaked up water until it was falling apart, and an AC coil that had not been cleaned since before the flood. The team advised discarding the plywood unit, replacing the damaged cushion, cleaning the AC and running a dehumidifier until the walls were dry. Ozone treatment was then booked for a Monday when the shop was closed. Ek's family left the building, the stairway to the upper floor was sealed with plastic sheeting, and the team treated two zones: the front of the shop, and the back area with the shampoo basin and storeroom.

After the rest and ventilation period, the family returned in the evening. Ek said the morning smell was gone and the shop smelled of shaving foam and pomade again. He put a small sign at the entrance saying the shop had been restored and ozone-disinfected after the flood so regular clients could return comfortably. The family also took his daughter to see a doctor about her congestion, because managing the environment is only one part of the picture, not a treatment.

Recovery checklist for salons, nail bars and barber shops after a flood

Step 1: Safety before entering

• Switch off power at the breaker and have an electrician check the system before using dryers, straighteners, foot spas or sterilizers.
• Wear boots, rubber gloves and a mask while removing mud. Cover any cuts on hands or feet.
• After wading, see a doctor right away for fever, calf pain or diarrhea.

Step 2: Sort what must go

• Towels, capes and sheets heavily soiled with mud or still smelly after washing should be discarded.
• Porous foot sponges, brushes, combs and files that were submerged should all be thrown away.
• Cosmetics, perm solutions, hair dyes, nail polish and creams whose boxes or caps got wet should not be used on clients.
• Swollen plywood cabinets and shelves usually hold moisture and mold inside and should be replaced.
• Chair cushions with soaked foam should be re-foamed by an upholsterer.

Step 3: Clean and dry

• Remove all mud and wash floors, lower walls, chair bases, basin pedestals and drains with water and detergent.
• Clean foot spa pipes according to the manufacturer's manual, or ask the brand's technician to check the motor.
• Clean the air conditioner filter and coil.
• Use fans with dehumidifiers and ventilation to dry as fast as possible. WHO and CDC advise cleaning and drying within 24 to 48 hours to limit mold growth.
• Do not repaint or rewallpaper until walls are completely dry.

Step 4: Ozone day

• All people, pets and plants must leave, including anyone upstairs if the air connects.
• Seal food, drinks and chemicals in closed containers or remove them.
• Open internal cabinets, drawers and storeroom doors so ozone reaches every corner.
• Close external doors, windows and vents as the team instructs.

Step 5: After ozone, before reopening

• Re-enter only after the team confirms the rest and ventilation period is complete.
• Return washed and dried towels to dry cabinets.
• Control humidity with AC or a dehumidifier, launder towels daily and never leave wet towels overnight.
• Wipe client contact surfaces between clients with a suitable disinfectant.
• If the odor returns, look for hidden moisture such as leaking pipes or still-damp walls, and fix the source.

Frequently asked questions about salon flood recovery and ozone

1. After ozone, do I still need to disinfect scissors and clippers?

Yes. Tools that touch skin, scalp and nails must still be cleaned and disinfected to your salon standard every time. Ozone treats the air and the whole space. The two work together; one does not replace the other.

2. Can staff wait in the back room during treatment?

No. There must be no people, pets or plants in the treated area. If the salon connects to living space upstairs, the team will assess whether everyone must leave the building, and nobody returns until the rest and ventilation period is over.

3. Will ozone damage vinyl chairs, basins or electrical tools?

A professional team controls concentration and time to suit the space. Before starting, it assesses the materials in your shop and advises what to store or remove, such as cosmetics, chemicals and delicate items, so the treatment is effective and safe for your property.

4. How long must the shop close?

The treatment itself takes about 30 minutes per zone, plus preparation, rest and ventilation, so most salons book it on their day off or after closing. What takes longer is getting the shop truly dry beforehand, and that should never be rushed.

5. Is one treatment enough?

If cleaning is complete, damaged materials are gone and the shop is fully dry, one treatment usually finishes the job well. If a hidden moisture source remains, such as a leak under a basin or a wet wall, odor and mold can return, so fix the cause first. The team will advise based on your shop's actual condition.

6. How much does it cost, and are there promotions?

Price depends on shop size, number of zones and the extent of damage. Call or message on LINE for an assessment. Ozone jobs of 15,000 baht or more include a free medical-grade disinfectant spray.

Is your salon ready to welcome clients back?

Let the WHD team finish your salon, nail bar or barber shop flood recovery with residue-free ozone disinfection, so clients can sit in their usual chair again with complete peace of mind.

See the Ozone Disinfection Service

Call 065-556-6294  |  LINE @whd268  |  worldhealthdisinfection@gmail.com

Related pages

• Residential and Building Ozone Disinfection
• Chemical residue odor removal with ozone
• Chemgene disinfectant
• Certification documents
• Contact us

References

• CDC: Floods (cleanup guidance)
• World Health Organization fact sheets