A Story from the Field: Two Weeks Before a Banquet Booked Six Months Ago

Nida is the sales manager of a mid-sized hotel in the center of Prachinburi town, not far from the Prachinburi River. The hotel has around eighty guest rooms, three meeting rooms and a large ground-floor banquet hall. That hall is the hotel's main source of income at the end of the year: weddings, New Year parties for factories in the nearby industrial estates and seminars for government agencies.

In early October 2026, the Prachinburi River overflowed into the town. Water entered the hotel's ground floor to a depth of about thirty centimeters and stayed for almost a week. The staff worked together to lift tables, chairs and sound equipment out of the way. But the wall-to-wall carpet in the banquet hall, the floor-length curtains and the fabric acoustic panels in the meeting rooms could not be lifted out of the water in time.

When the water drained away, the housekeeping team extracted water from the carpet and ran the air conditioning and fans day and night. Five days later, Nida opened the banquet hall door and was still hit by a heavy, damp smell. The hems of the curtains had a brown tide mark and a line of black spots. In the corners, the carpet still felt soft and wet underfoot. The small meeting room, which had been closed all week, smelled like an old basement.

Her phone would not stop ringing. A couple who had booked their wedding six months earlier wanted to know whether it could still go ahead. A company that had reserved a meeting room for staff training asked to inspect the venue first. A guest who had stayed in a ground-floor room posted a review saying the room "smelled musty and gave me a blocked nose." Nida knew she had just two weeks until the first big banquet, and replacing every carpet and curtain was not realistic in either time or budget.

The same story is unfolding at hotels, resorts, convention venues and restaurants with function rooms across Mueang Prachinburi, Kabin Buri and Si Maha Phot, wherever floodwater reached the ground floor this year.

Why Carpets, Curtains and Closed Rooms Are a Big Problem for Hotels After a Flood

Hotel meeting rooms and banquet halls are designed to be quiet and to absorb sound, so they are full of materials that also absorb moisture extremely well: large carpets with thick underlay, heavy multi-layer curtains, fabric-covered walls, acoustic ceiling tiles and upholstered chairs. When floodwater soaks in, moisture and germs become trapped in deep layers that you cannot see. These rooms often have no opening windows either, so the air hardly moves.

Health risks for guests and staff

• Mold and spores. Mold in carpets and curtains releases spores into the air whenever people walk around or the air conditioning runs, causing sneezing, a blocked nose, itchy eyes and asthma attacks.
• Floodwater bacteria. Organisms such as E. coli can persist in carpet underlay and on surfaces that were under water.
• Leptospirosis. Housekeepers and maintenance staff who pull up carpets and clean without protective equipment are at risk.
• Allergies and skin irritation. Long contact with damp fabrics and upholstery can trigger rashes and other reactions.

The World Health Organization highlights that the clean-up period after flooding brings its own health hazards, including exposure to mold and contaminated materials. For a hotel, where guests expect clean air as a matter of course, these hazards are also a direct threat to the business.

Risks to revenue and reputation

In a hotel, smell is the first impression. Guests who walk into a banquet hall and notice a musty odor will remember that atmosphere for the rest of the event. A couple investing in the most important day of their lives will not accept it. A company planning a seminar will happily move to another venue. And just a handful of online reviews mentioning damp smells or mold can affect room bookings for months.

The end of the year is also peak season for functions in Prachinburi, with factory New Year parties, weddings in the cool season and year-end government meetings. A banquet hall that is out of action, or that is open but smells wrong, can cost the hotel a large share of its annual function revenue in just a few weeks.

Risks to assets

Large carpets, curtains and fabric wall panels are expensive. Replacing all of them takes money and several weeks of work. If moisture is left in place, mold spreads to the timber framing behind the walls, the ceiling and the ductwork, steadily increasing maintenance costs.

Why the Usual Hotel Approach Doesn't Solve It

Extracting water and shampooing the carpet. This removes surface water and mud, but the underlay beneath still holds moisture and germs, and the musty smell slowly rises again.

Running air conditioning and fans around the clock. This dries the surface but does not destroy mold spores. It can even blow spores around the room or into the ductwork, spreading the problem to other rooms.

Air fresheners and scent diffusers. These mask the smell temporarily, but perfume mixed with mustiness in a closed room makes guests feel uncomfortable, and the odor returns as soon as the fragrance fades.

Wiping with bleach. Bleach is unsuitable for carpets, curtains and fabric walls. It causes blotches and damages fibers, and it leaves a strong chlorine smell behind.

Replacing everything immediately. In some cases replacement is necessary, but doing it without first dealing with moisture and mold in the room itself risks new carpets and curtains picking up the same smell within weeks.

The Solution: Closed-Room Ozone Treatment Combined with Chemgene HLD4H Fogging

Meeting rooms, banquet halls and hotel guest rooms are enclosed spaces that are ideally suited to our ozone treatment service. Ozone is a gas with strong oxidizing power. It spreads into carpet fibers, curtains, fabric wall panels and the cavity above the ceiling, helping to destroy mold spores and break down the molecules that cause musty odors. Once treatment is complete and the room has been ventilated, ozone breaks back down into oxygen, leaving no residue and no chemical smell on fabrics.

Before ozone treatment, our team uses our disinfection fogging service with CHEMGENE HLD4H, applied through an ultra-low-volume (ULV) fogger, to reduce bacteria, viruses and fungi on surfaces that were in contact with floodwater, such as floors, skirting, table legs, doors and restrooms.

Using the two together covers both sides of the problem. Fogging deals with the surfaces that hands and feet touch directly. Ozone deals with the odors and spores embedded in fabric and suspended in the air. The room does not just look clean; it genuinely smells fresh, which is something guests notice from the moment they step through the door.

Our process for hotels

1. Site survey. We check how high the water reached, where carpets are still damp, which curtains and walls are stained and how the air-conditioning system is routed.
2. Room preparation advice. We advise on extracting water, lifting or removing soaked underlay, washing or taking down mud-stained curtain sections and getting rooms as dry as possible before treatment.
3. ULV disinfection fogging. The ground floor, meeting rooms, banquet hall, corridors and restrooms are fogged thoroughly.
4. Room-by-room ozone treatment. Doors are closed, and duration and concentration are set to each room's size and odor level. Work can be zoned so the rest of the hotel continues operating normally.
5. Ventilation. Doors are opened and the ventilation system is run until the ozone has fully broken down, before staff and guests return.
6. Re-check. We check odors and damp spots again and advise on what to do before the event day.

Spots Hotels Often Overlook After the Water Recedes

• Carpet underlay. Even when the carpet surface feels dry, the underlay can still be damp and is often the main source of the smell.
• Curtain hems that touch the floor. Fabric wicks water several centimeters above the flood line and often develops a line of mold.
• Storerooms for tables, chairs and linen. Tablecloths and chair covers stacked in a closed storeroom can grow mold without anyone noticing.
• Ground-floor air vents and ducts. Moisture drawn into the system carries the smell to other rooms.
• Lifts, lift pits and plant rooms. Water may have collected here; have them inspected by qualified technicians at the same time.

Repair or Replace? Making Smart Decisions About Carpets and Curtains

One of the hardest questions for hotel management after a flood is what can be saved and what has to go. There is no single answer, but a few general principles help.

Carpet underlay that has been soaked in contaminated floodwater for several days is usually the weakest point. It is relatively inexpensive compared with the carpet itself, it holds moisture stubbornly and it is often the main source of odor. In many cases, replacing the underlay in affected areas while keeping and treating the carpet above it is a sensible compromise.

Carpet that has been submerged for a long time, is visibly delaminating or still smells strongly after thorough drying may need to be replaced. Carpet in areas that were only briefly wet, or that took on water from humidity rather than direct flooding, can often be restored with cleaning, drying, disinfection and ozone treatment.

Curtains are similar. Lower sections stained with mud may need professional washing or replacement, but the upper parts of the curtains, which only absorbed humidity and odor from the room, usually respond well to ozone. Fabric wall panels and acoustic tiles should be checked for staining and softness; those that are only musty can usually be treated in place.

Our survey is designed to help you make these decisions with confidence. We will tell you honestly where treatment is likely to work and where replacement is the better choice, so that your budget goes where it does the most good.

Planning Recovery Around Your Event Calendar

For a hotel, the biggest constraint after a flood is often not money but time. Events are booked weeks or months in advance, and every day a function room is unavailable is a day of lost revenue. A good recovery plan starts with the calendar.

Begin by listing every confirmed event over the next six to eight weeks and the rooms they need. Prioritize the spaces with the earliest bookings and the highest value, typically the main banquet hall and the meeting rooms used for corporate events. Rooms that are not needed until later can be dried more slowly and treated afterwards.

Next, allow realistic time for drying. Disinfection fogging and ozone treatment work best on materials that are as dry as possible, so the first days after the water leaves should focus on extraction, dehumidification and removing soaked underlay. Once the room is reasonably dry, the treatment itself can usually be completed quickly, leaving time for ventilation, a re-check and a final housekeeping clean before the event.

Finally, build in a buffer. Schedule treatment so that there are at least a couple of days between completion and the event, giving you room to deal with any spot that needs extra attention. This also gives your sales team a window to invite nervous clients for a site visit, so they can see and smell the result for themselves.

Communicating with Guests and Clients After a Flood

Guests and event clients are usually understanding about natural disasters. What worries them is uncertainty. A short, honest message explaining what happened, what you are doing about it and when the rooms will be ready goes a long way toward keeping bookings.

Explain that affected areas are being cleaned, disinfected and ozone-treated by a professional team, and that rooms are ventilated and checked before reopening. Offer site visits for upcoming events. If a guest leaves a review mentioning a musty smell, reply politely, thank them for the feedback and describe the steps you have taken since. Future guests reading that exchange will see a hotel that takes hygiene seriously.

10 Reasons Prachinburi Hotels Choose WHD for Ozone Treatment

1. Ozone treatment reaches into carpet and curtain fibers to remove musty odors at the source.
2. It can reduce the need to replace every carpet and curtain in areas that can still be restored.
3. No chemical or perfume smell is left behind in your banquet hall.
4. Backed by ULV disinfection fogging on surfaces that touched floodwater.
5. We use CHEMGENE HLD4H, a disinfectant suited to surfaces in real working environments.
6. Work is zoned, so there is no need to close the whole hotel.
7. Sound equipment, screens and artworks are protected by covering or removal before treatment.
8. Get back to weddings, New Year parties and seminars in time for the season.
9. A clear process your sales team can explain to clients who have booked events.
10. Extend the clean-up to guest rooms with our dust mite removal service for mattresses and pillows.

Before and After Banquet Hall Ozone Treatment

What Our Customers Say

"We thought we would have to replace the carpet in the whole room. Instead, we removed the damaged underlay, and the team fogged and ozone-treated the hall. The smell was gone, and the clients who came to inspect the venue decided to hold their event with us as planned."

— Hotel sales manager, Mueang Prachinburi (scenario from the field)

Advice for Hotels After the Water Recedes

• Make sure cleaning staff wear rubber gloves, boots and masks, and cover any cuts completely.
• Have electrical systems, lifts and ground-floor air conditioning inspected by qualified technicians before use.
• Remove badly damaged carpets, underlay and fabrics first so rooms can dry faster.
• Communicate openly with clients who have booked events, sharing a clear recovery plan and timeline.
• If staff develop a high fever, calf pain or red eyes after wading through floodwater, they should see a doctor, following advice from the Department of Disease Control.
• Keep a record of what was treated and when; it reassures clients and is useful for insurance.
• Check upper-floor guest rooms too. Even rooms that stayed dry can pick up a musty smell from the humid air during the flood, and guests will notice it as soon as they open the door.

Frequently Asked Questions

Q: If we use ozone, does that mean we never need to replace the carpet?
A: It depends on the damage. Carpet or underlay that has been submerged for a long time and has deteriorated should be replaced. Where materials can still be restored, ozone treatment combined with disinfection fogging can remove odors and mold. Our team will give you an honest assessment.

Q: Can the hotel stay open while you work?
A: Yes. We plan the work in zones and close only the room being treated, while the rest of the hotel operates normally.

Q: What about the sound system and projectors in the meeting rooms?
A: Removable equipment should be taken out, and fixed installations should be fully covered. Our team controls the ozone dose appropriately.

Q: Guest rooms upstairs didn't flood but smell musty. Can you treat them?
A: Yes. High humidity during the flood can make upper-floor rooms musty too, and ozone treatment helps freshen them.

Q: What happens during treatment?
A: No people, animals or plants may be in the room, and you must wait until ventilation is complete and our team confirms it is safe.

Q: Can you treat the linen store, tablecloths and chair covers as well?
A: Yes. Linen that has only absorbed humidity and odor can be laid out or hung in a closed room and treated with ozone after washing and drying. Items stained with floodwater mud should be professionally laundered first, and anything badly damaged is better replaced.

Q: Will the treatment affect the hotel's air-conditioning system?
A: Ozone can help freshen the ducts serving the treated rooms when the system is set to recirculate. We coordinate with your engineering team on which units to run and when, and we recommend having filters and coils cleaned as part of your normal post-flood maintenance.

Q: Do you work at night or outside event hours?
A: Where possible, we can schedule work around your operations so that treatment and ventilation happen when the rooms are not in use. Please discuss timing with our team when you book the survey.

Q: How do we get in touch?
A: Call 065-556-6294 or message LINE @whd268.

Get Your Banquet Hall Ready for Guests Again

Talk to the World Health Disinfection team to plan ozone treatment and disinfection fogging for hotels, meeting rooms and banquet halls in Mueang Prachinburi and nearby areas.

Book Ozone Treatment – Click Here

See Our Disinfection Service – Click Here

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

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Sources: WHO – Floods and health and Department of Disease Control, Ministry of Public Health