A Story From the Field: The Small Room Next to the Car Park That Everyone Was Waiting For

An office building on Bang Na-Trat Road in Bang Na, Bangkok, has a small prayer room on the ground floor, right next to the walkway that leads in from the car park. Muslim employees from several companies in the building use it every day, as do customers of the shops on the lower level. It matters most at midday and in the afternoon, when there simply is not enough time in a lunch break to travel to a mosque and back.

During the 2026 floods, water poured into the ground-floor car park and flowed into the prayer room to a depth of roughly a hand span. It stayed there for several days before the pumps could clear it. When Farida, the building's facilities manager, walked in after the water had gone, the large wall-to-wall carpet was so waterlogged it was heavy to lift, and it gave off a powerful musty smell. The lower part of the gypsum walls had swollen and was spotted with black mold. In the wudu area next door, where people wash before prayer, mud had settled into the grout lines and an unpleasant smell was rising from the floor drain.

Within a few days Farida was receiving messages from staff asking when the prayer room would reopen. Some had started laying their prayer mats in an empty meeting room. Others were walking to a mosque further away during a lunch break that left them little time. Farida is not Muslim herself, and she was particularly anxious to restore the room correctly and in a way that respected the people who use it.

This article is written for building managers, mall operators and condominium or office juristic persons who need to restore a prayer room after a flood. It uses professional disinfection fogging and controlled ozone treatment as the core steps, and it builds every step on respect for the space and for the people who pray there.

Why a Flooded Prayer Room Needs More Care Than an Ordinary Room

Health. Prayer involves bowing and prostrating, with the forehead, nose, palms and knees touching the floor several times a day. If the carpet or floor still carries germs left behind by floodwater, worshippers are in much closer contact with it than someone simply walking through a corridor. Floodwater in a car park is often mixed with engine oil, wastewater and sewage backflow, which can carry bacteria that cause diarrhea and organisms that cause skin infections. Mud contaminated with rodent urine also raises the risk of leptospirosis, which can enter the body through small cuts and scratches.

Mold and allergies. A soaked carpet and swollen gypsum board are ideal breeding grounds for mold. When someone prostrates, their face is right at the level where spores collect and are stirred up. That can cause sneezing, an itchy nose, or flare-ups of allergies and asthma, sometimes in the middle of prayer.

The wudu area. Ritual washing before prayer involves the face, hands, arms and feet. If the taps, the low seats, the floor and the drain are still coated with mud and bacteria, the very place meant for cleansing becomes a point of risk. It is also one of the wettest areas in the building, so mold can return quickly if it is not properly treated.

Comfort, trust and the building's reputation. For the people who use it, a prayer room must be clean in body and in spirit. If the room still smells musty or shows mold stains, many will feel uncomfortable praying there and will look for alternatives. A building that restores its prayer room quickly and correctly shows tenants and customers that it cares for every community it serves, and that kind of attention is remembered long after the floodwater is gone.

Common Fixes That Fall Short in a Flooded Prayer Room

• Extracting water from the carpet and running fans. A large carpet that has sat in floodwater for days usually keeps its underlay and backing damp, and those layers hold bacteria, even when the surface looks dry. The musty smell returns as soon as the air conditioning is turned on and the room is closed.
• Pouring bleach on the floor and walls. Bleach helps on hard surfaces, but its sharp smell lingers for a long time, which is unpleasant in a room where people put their faces close to the floor. It can also discolor and damage carpet fibers.
• Spraying air freshener. This masks the smell for a while without removing mold or the source of the odor. Many worshippers also prefer not to have strong artificial fragrance in a prayer room.
• Painting over the walls. If the gypsum board is still damp inside and mold is growing in it, the paint will blister and the mold will come back before long. Board that swelled with water usually needs to be cut out and replaced.

A prayer room needs a complete sequence: sorting out damaged carpet and materials, cleaning, drying, disinfecting every surface, and dealing with odors and airborne mold spores.

The First Principle: Respect for the Space and for the People Who Pray There

The WHD team works in prayer rooms according to these principles:

• The room's caretaker handles items of religious significance. Copies of the Quran, religious books, prayer mats and worshippers' personal belongings should be stored and moved by a Muslim staff representative or the person who normally looks after the room, to a clean and suitable place. Building management should coordinate this in advance. Our team does not touch or move these items.
• Work happens outside prayer times. Appointments are set at times that do not overlap with prayers, especially the busy midday and afternoon prayers, and avoid Friday midday. Most work is therefore best done in the evening or when the building is closed at the weekend.
• Ask before entering. Where a room has separate sections for men and women, or particular customs about footwear, the team asks the caretaker first, and only uses shoe covers where equipment makes them necessary.
• Tell users in advance. Share the name of the disinfectant, the dates the room will be closed, the location of the temporary prayer room, and the expected reopening date.

Questions of religious purity are for the worshippers and their religious advisers to decide. The WHD team's role is limited to reducing germs, mold and odor in the room.

The Solution: CHEMGENE HLD4H Fogging Plus Controlled Ozone Treatment

The disinfection service from World Health Disinfection uses CHEMGENE HLD4H, applied with ULV (ultra-low volume) fogging equipment. ULV produces a very fine mist that settles across floors, wall corners, skirting boards, shoe racks and the wudu area, including the gaps under the low seats and the area around the floor drains, where a mop or cloth cannot reach evenly.

After fogging, the team uses the ozone treatment service in rooms that can be sealed. Ozone is a gas that spreads throughout a closed room, helping to destroy airborne mold spores and break down odor molecules that have soaked into ceilings, walls and wall coverings. Most prayer rooms inside malls and office buildings are enclosed, air-conditioned rooms, which makes them very well suited to ozone treatment.

The step-by-step process

1. Joint survey with building management and the room's caretaker. Check how high the water reached and the condition of the carpet, walls, ceiling, wudu area and drains, and agree on dates and times that avoid prayer times.
2. Advice on sorting materials. Carpet that sat in floodwater for several days usually needs replacing, and swollen gypsum board should be removed first. The team advises which parts should be replaced and which can be cleaned and kept.
3. The caretaker stores religious items. The Quran and religious items are moved to a clean place before the work day. The team helps cover speakers, prayer-time clocks and other electronics.
4. ULV disinfection fogging. Floors, walls, the wudu area, restrooms and shoe racks are fogged while nobody is inside.
5. Controlled ozone treatment. The room is sealed with no people, animals or plants inside, and the dose and duration are matched to the room's size.
6. Ventilation. Doors and the ventilation system are opened, and the team tells building management when it is safe to re-enter.
7. Re-check after the new carpet is laid. Once the walls are repaired and new carpet is installed, odor and moisture are checked again, and a follow-up treatment can be booked if needed.

Ozone safety: during ozone treatment there must be no people, pets or plants in the room, and the room must be fully ventilated before anyone returns. Electronics, rubber items and delicate materials should be covered or removed. The team controls the ozone dose to suit the size of the room.

A Plan for Building Management: Keep a Place to Pray Throughout the Recovery

Set up a temporary prayer room. Choose a small meeting room or unused space that was not affected by the flood. Clean it and wipe down frequently touched surfaces with CHEMGENE HLD4H spray, then consult the users on the qibla direction and how the space should be arranged. Put up clear signs so newcomers and customers can find it.

Communicate with tenants and staff. Send a notice through the building's email list or chat group that states the closure dates, the location of the temporary room and the expected reopening date of the original room. Update it if the schedule changes, so nobody is left guessing.

Follow a clear sequence. Pump out water and remove mud → remove damaged carpet and wall sections → dry the floor and wall cavities → disinfection fogging → ozone treatment → repair walls and lay new carpet → re-check → reopen.

Treat the connected areas too. The restrooms and the walkway from the car park to the prayer room should also be disinfected, because worshippers pass through them every day, often barefoot after wudu.

Think about the next flood. When choosing new materials, building managers may consider carpet tiles that can be lifted and replaced in sections, moisture-resistant wall boards for the lower part of the walls, and raised storage for religious books, so that a future flood causes less damage and the room can reopen faster.

Spots That Are Often Overlooked in a Flooded Prayer Room

• The carpet underlay and the floor beneath it. This is a hidden reservoir of moisture. Lift a section and make sure the floor is truly dry before laying new carpet.
• The floor drains in the wudu area. Wastewater may have backed up through them during the flood. Flush and disinfect the drains, and check the grates and odor traps.
• Shoe racks and storage cabinets. Plywood and MDF furniture that got wet tends to swell and grow mold inside, out of sight.
• Air-conditioning vents and the ceiling. Humidity in a closed room lets mold settle on vent grilles and ceiling panels. Have the air conditioner cleaned before switching it back on.
• Curtains separating men's and women's sections. Damp fabric should be washed and dried completely, or replaced if mold stains remain.

For carpets or prayer mats that were not submerged but were stored in the damp room, a dust mite removal service can extract dust and debris from deep within the fibers.

Extra Notes for Shopping Malls and Large Mixed-Use Buildings

Prayer rooms in malls serve a wider public. In an office building, the prayer room is mostly used by a known group of employees. In a shopping mall, it is also used by shoppers, tourists, delivery riders and staff from dozens of different tenants. That means the room may see many more visitors per day, and the people using it cannot easily be reached with a notice by email. Clear signs at the entrance, near the information counter and on the mall's own social media channels help visitors find the temporary prayer room during the recovery period.

Coordinate with security and housekeeping teams. Mall security staff are often the first people visitors ask for directions. Make sure every shift knows where the temporary room is, when the original room will reopen, and that nobody may enter the room during ozone treatment. Housekeeping teams should know which cleaning products are used in the temporary room and how often frequently touched surfaces such as door handles, shoe racks and tap handles are wiped down.

Separate wudu facilities need separate attention. Larger malls may have separate wudu areas for men and women, sometimes located some distance from the prayer room itself. Each one should be inspected for flood damage, drain backflow and mold on the lower walls, and each should be included in the disinfection plan.

Plan the timing around trading hours. Because many malls open from mid-morning until late at night, the most practical window for fogging and ozone treatment is often after closing time. This also avoids every daily prayer, since the room is closed to the public. The WHD team can schedule night work so that the room, and the corridor leading to it, are ventilated and ready before the mall opens the next morning, or before the planned reopening day.

Keep a simple record. A short log of what was done and when, covering mud removal, carpet replacement, disinfection, ozone treatment and re-check, is useful for the building's maintenance records, for insurance claims where relevant, and for answering any questions from tenants or worshippers about how the room was restored.

10 Reasons Building Managers Choose WHD to Restore a Prayer Room

1. We work respectfully: the room's caretaker stores the Quran and religious items, and we never handle them.
2. We schedule outside prayer times, avoiding midday and Friday midday in particular.
3. We use CHEMGENE HLD4H disinfectant, a clearly named product you can share openly with users.
4. ULV mist reaches the wudu area, skirting boards and shoe racks.
5. Ozone treatment suits enclosed, air-conditioned prayer rooms in buildings.
6. No need for air freshener, because the treatment addresses the source of the odor.
7. We control the ozone dose and cover speakers and prayer-time clocks before treatment.
8. We advise on which carpet and wall sections should be replaced, helping you plan the budget.
9. We can extend the work to corridors, restrooms and staff accommodation if the building needs it.
10. We are easy to reach by phone and LINE, so building management can coordinate smoothly.

Before and After: A Prayer Room Ready for Use Again

In the Words of a Building Manager

"We are not Muslim, so we were afraid of doing something wrong. The team suggested we invite the staff member who looks after the room to the survey, let him store the Quran and the prayer items himself, and then book the work for a Saturday evening after closing. On the day the room reopened, several employees told us it felt fresher and cleaner than before the flood."

— Facilities manager of an office building on Bang Na-Trat Road, Bang Na (a story from the field)

Frequently Asked Questions

Will your team handle the Quran or other religious items?
No. The room's caretaker or a representative of the users stores and moves them before the work day. Our team only deals with surfaces, the room and the air.

When can the work be done?
Outside prayer times. Usually that means evenings after office hours or days when the building is closed, avoiding Friday midday.

Should a flooded prayer carpet be cleaned or replaced?
Carpet that sat for several days in floodwater mixed with wastewater usually needs replacing, because the backing and underlay hold bacteria and moisture that are very hard to remove completely.

How long after ozone treatment can the room be used?
It depends on the room's size and ventilation. The team will tell you when it is safe. Nobody may be in the room during treatment.

How many days will the prayer room be closed?
The fogging and ozone treatment themselves are quick, but the total time depends on removing carpet, repairing walls and drying the floor. Building management should keep a temporary prayer room available throughout.

Can the temporary prayer room be disinfected too?
Yes. If the temporary room is used by many people every day, it can be included in the fogging plan, scheduled outside prayer times like the main room. Between treatments, housekeeping can wipe door handles, light switches, shoe racks and tap handles with a ready-to-use disinfectant spray.

Our prayer room was only damp, not flooded. Does it still need treatment?
A room that was closed and humid for weeks, for example because the power or air conditioning was off, can still develop mold on walls, ceilings and carpets and a strong musty smell. In that case, ozone treatment to tackle odor and airborne spores, combined with cleaning the air-conditioning unit, is often enough, and the carpet may only need deep cleaning rather than replacement. The survey will show which approach fits.

What should the building prepare before the team arrives?
Coordinate with the caretaker to store religious items, notify users of the closure, set up a temporary room, and make sure the team can access the wudu area and restrooms.

Bring Your Building's Prayer Room Back, Clean and Ready

Malls, office buildings and building juristic persons in Bang Na and across Bangkok can contact us for a survey and an appointment outside prayer times.

View Disinfection Service – Click Here

Book Ozone Treatment – Click Here

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

Related Articles and Resources

• Ozone treatment for odors and chemical residue
• Master Ozone Generator
• Dust mite removal service
• All articles
• External sources: WHO: Floods and health and Thailand Department of Health

#PostFloodDisinfection #PrayerRoomDisinfection #OzoneTreatment #MustyOdorRemoval #MoldRemoval #Disinfectant #BuildingFloodRecovery #DisinfectionService

Keywords: prayer room disinfection after flood, ozone treatment prayer room, mall prayer room, office building prayer room, wudu area after flood, Bang Na, Bangkok 2026