A Story From the Field: A Boatyard That Has Always Lived With the River

Witthaya took over his father's small boatyard on the banks of the Chao Phraya River in Bang Pa-in. Most of his customers run long-tail boats, water taxis and the small family boats that local people use to get around. At the front of the yard is a slipway and a cradle for hauling boats out of the water. Just above it is the engine workshop, with workbenches, tool cabinets and racks of spare parts. Beside the workshop stands a low, raised wooden storeroom holding boat cushions, life jackets, canvas covers, mooring ropes and parts waiting to be fitted. At the back are a small office, a rest room for the mechanics and a toilet.

People who live by the river are used to the water rising and falling, but this year it climbed higher than Witthaya had expected. The river overtopped the bank and flooded the workshop and storeroom to nearly knee height, and the water stayed for more than a week. He managed to lift the engines he was working on onto the upper level and carry some of the power tools to higher shelves. But several drums of old engine oil, containers of used oil and tins of marine paint on the bottom shelves tipped over and floated away from their places.

When the water went down, the workshop floor was covered in black mud with a rainbow sheen of oil on top. The smell of fuel mixed with the stench of river mud was so strong that every door had to be opened. In the storeroom, the stacked boat cushions were soaked through, with black mold appearing along their seams. The life jackets smelled musty. The folded canvas covers had round patches of mold. In the mechanics' rest room, the folding mattresses and pillows smelled so bad that nobody wanted to go in.

Witthaya's phone would not stop ringing. Many boats in the community had been damaged in the flood, and their owners wanted the yard open as soon as possible. But one of his mechanics had developed an itchy rash on his legs after wading in to help move things, and another had been coughing ever since he carried cushions out of the storeroom. Witthaya realised he could not simply reopen without dealing with hygiene first.

If you run a boatyard, marine engine workshop, boat rental business or riverside warehouse in Bang Pa-in or elsewhere along the river in Ayutthaya, and you are facing a similar situation after the 2026 floods, this article is for you.

Why Riverside Buildings Grow Mold So Quickly

• Humidity never really drops. Air beside a large river stays humid even on sunny days, so damp materials dry far more slowly than they would inland.
• Raised wooden floors trap moisture underneath. The space below a raised storeroom holds mud and standing water long after the main flood has gone, and that moisture rises through the floorboards.
• Fabric and foam equipment is stored in bulk. Cushions, life jackets and canvas covers are often piled together, which stops air from reaching the inner layers.
• Organic river silt feeds mold. The fine mud left by the river contains plant matter and other organic material that gives mold an easy start on every surface it coats.
• Workshops are often closed up during the flood. With doors shut for a week or more, warm, wet air has nowhere to go and spores spread throughout the building.

What a Boatyard and Riverside Warehouse Are Up Against After the Water Recedes

Health

Floodwater along the river carries germs from sewage and drains, such as E. coli, which can cause diarrhea. Mechanics who wade through water or mud without boots are at risk of leptospirosis, especially along riverbanks where rats are common. Rashes and skin infections tend to appear in people who have cuts and are exposed to dirty water for long periods. For anyone with allergies or asthma, mold spores from cushions, canvas and storeroom walls may cause coughing, sneezing or difficulty breathing. The World Health Organization and Thailand's Department of Disease Control both highlight these risks in their flood guidance.

Chemicals and safety

A boatyard always has fuel, engine oil, grease, thinners and marine coatings on site. During a flood these can leak out and mix with the mud. Oil films make floors slippery, and fuel vapor in a closed room can be harmful and flammable. If you notice a strong smell of fuel or gas, do not light anything, do not operate electrical switches, leave the area and contact the relevant authorities immediately.

Income

The weeks after a flood are exactly when many boats in a community need repairs at the same time. If the yard cannot open, customers have little choice but to go elsewhere. Damaged cushions, life jackets and spare parts are additional costs on top of lost work.

Customer confidence

A customer who collects a boat and notices a musty smell from its new cushions, or sees mold spots on the life jackets, may start to question the yard's standards. For water taxis that carry passengers, the cleanliness of on-board equipment reflects directly on the operator, and on the yard that serviced the boat.

Why Hosing Down the Floor and Reopening Is Not Enough

• Hosing oily residue into the river. This sends contaminants straight back into the environment, and some of the oil stays trapped in floor joints and wall bases anyway. Use oil-absorbent materials and dispose of them properly.
• Mixing bleach with other cleaners. Bleach combined with certain products, such as ammonia-based or acidic cleaners, can release dangerous gases, and it does nothing about mold deep inside cushions and canvas.
• Drying boat cushions in the sun and reusing them. The cover may feel dry, but the foam inside stays damp and holds dirty water. The smell and the mold will come back.
• Spraying air freshener in the office and rest room. This only masks the odor for a while. The source is still in the walls, mattresses and carpet.
• Using power tools straight away. Drills, grinders and pumps that were submerged may still hold moisture in their motors, creating a risk of short circuits and electric shock. Have an electrician check them first.

The underlying principle is simple: deal with the mud, oil and chemicals first, then restore the hygiene of the building. Disinfection and ozone treatment work best on a space that has already been cleared of mud and flammable materials.

A Safe Clean-Up Order for a Boatyard (Before Our Team Arrives)

1. Check that it is safe to enter. Make sure the workshop structure and storeroom floor are sound and have not sunk or shifted. Watch out for snakes, centipedes and other animals that may have sheltered inside to escape the water.
2. Electrical system. Keep the breakers off and have a qualified electrician inspect the wiring, sockets and every power tool before use.
3. Fuel, oil and chemicals. Stand up any drums and tins that tipped over, close their lids tightly and move them to a well-ventilated storage area. Soak up oil on the floor with absorbent materials, and collect oily waste separately from general rubbish so that it can be disposed of correctly.
4. Shovel out the mud. Wearing rubber gloves, boots and a mask, remove the mud from the workshop and storeroom, then wash the floors with clean water and detergent.
5. Sort cushions and fabric equipment. Cushions that were submerged, with foam that soaked up dirty water, usually need new filling or must be thrown away. Canvas covers that are still strong can be washed and dried thoroughly. Ropes that have rotted or smell strongly should be replaced.
6. Life jackets. These are safety equipment. If the shell is torn, the foam has lost its shape or the buckles are damaged, replace them. Jackets that are still sound should be cleaned according to the manufacturer's instructions and dried completely in the shade.
7. Engines and parts. Outboard and long-tail engines, drive shafts and parts that were submerged are a job for a marine mechanic, who will strip, clean and change fluids in the proper sequence.

Please note: WHD does not provide oil spill clean-up, engine repair or electrical inspection. Those tasks should be handled by the relevant specialists. Our job is to disinfect flood-borne germs, reduce mold and remove musty odors from the workshop, storeroom, office, mechanics' rest room and toilets, once mud and chemicals have been cleared.

The Solution: Disinfection Fogging for the Workshop, Ozone Treatment for the Storeroom and Rooms That Can Be Closed

WHD's disinfection fogging service uses CHEMGENE HLD4H applied through a ULV fogger that produces a fine mist. It reaches floors, lower walls, the spaces under workbenches, parts racks, toilets and the rest room, helping to deal with flood-borne germs and surface mold. Fogging is especially suited to workshops that are open on one or more sides, where ozone cannot build up properly.

Our ozone treatment service is ideal for the equipment storeroom, office and mechanics' rest room, which can be closed. Ozone helps destroy airborne mold spores and break down odor molecules trapped in wooden walls, carpet and stored items. Before treatment, our team checks that fuel, thinners and other flammable materials have been removed from the room and that it has been ventilated until no vapor smell remains. Ozone is an oxidiser and should not be used in a room that still contains flammable vapors.

Rubber and foam items, such as seals, hoses and some cushions, can deteriorate faster under high ozone concentrations. Our team therefore uses a controlled concentration and duration, asks for rubber spare parts waiting to be fitted to be moved out, and covers or removes electronics such as office computers and engine diagnostic tools before starting.

Ozone safety: during treatment there must be no people, pets or plants in the space. Afterwards, doors and windows are opened to ventilate until the ozone has broken down, before mechanics return to work.

How the WHD Team Works in a Boatyard

1. Site survey. We check the water line, mold spots and where fuel and chemicals are stored, and divide the site into open zones and zones that can be sealed.
2. Readiness check. We confirm that mud has been cleared, flammable materials removed and the electrical system inspected by an electrician.
3. Preparing the space. Tools, electrical panels and computers are covered, and rubber parts and other items that should not be exposed to ozone are moved out.
4. Disinfection fogging. CHEMGENE HLD4H is applied in the workshop, toilets, rest room, walkways and storeroom.
5. Ozone treatment. The storeroom, office and rest room are sealed, machines are set according to room size, and the duration is controlled.
6. Ventilation. Doors and windows are opened until the air is safe.
7. Re-check. We check odor and mold again and advise on storing cushions, life jackets and canvas off the floor with good airflow.

Where customers are waiting, the work can be scheduled so that the workshop is ready first and repairs can resume, with the storeroom and rest room following. The final plan always depends on the site and the owner's priorities.

Storing Boat Equipment So It Stays Fresh Through the Rest of the Rainy Season

A riverside storeroom will always be more humid than a building inland. A few simple habits can make a big difference to how quickly mold returns:

• Keep everything off the floor. Store cushions, life jackets and canvas on raised racks rather than directly on the boards, so a small rise in water or a wet floor does not reach them.
• Let air move. Hang life jackets individually on hooks rather than stacking them in piles. Stand cushions on their edges with gaps between them.
• Dry before storing. Never put canvas covers or ropes away wet. Let them dry fully in the shade after every use.
• Ventilate on dry days. Open the storeroom doors and windows whenever the weather allows, and consider a dehumidifier for the office and rest room.
• Wipe down regularly. Clean shelves, door handles and workbenches with a suitable disinfectant such as CHEMGENE HLD4H spray, sprayed onto a cloth first.
• Store chemicals separately. Keep fuel, oil and thinners in their own ventilated, raised storage area, away from fabric equipment and away from the rest room.
• Check monthly. Open a few cushions and jackets each month and check for spots or smells, so problems are caught early.

Looking After Your Mechanics While You Recover

A small boatyard depends on a handful of skilled people. Protecting their health during the clean-up is part of protecting the business.

• Provide rubber boots, gloves and masks, and make sure they are actually worn during clean-up.
• Cover cuts and grazes with waterproof dressings, and wash skin thoroughly with soap and clean water after any contact with floodwater or mud.
• Set up a clean place to wash hands and change clothes before eating or going home.
• Encourage anyone who develops a fever, muscle pain, a spreading rash or persistent cough after the flood to see a doctor and mention that they were exposed to floodwater.
• Restore the rest room and toilet early, so the team has a clean place to rest during long repair days.

Communicating with waiting customers matters just as much. Let boat owners know the yard was flooded, which steps you are taking, and roughly when you expect to start on their boat. Be honest if a cushion set or life jacket needs replacing rather than cleaning, and explain why. When a boat is ready, mention that the workshop and storeroom have been disinfected and ozone-treated after the flood. Owners of water taxis in particular appreciate knowing that the equipment going back on board has been stored in a clean, dry space.

10 Reasons Boatyards in Bang Pa-in Choose WHD

1. We use disinfection fogging that suits open-sided workshops.
2. We use ozone treatment in storerooms and rooms that can be sealed.
3. We use CHEMGENE HLD4H for high-level disinfection.
4. We always check that flammable materials have been removed before ozone treatment.
5. We control ozone concentration and move ozone-sensitive rubber parts out first.
6. We reduce musty odors in storerooms holding cushions, life jackets and canvas.
7. We restore mechanics' rest rooms and toilets so your team can work comfortably.
8. We zone the work so the yard can start taking repairs again as early as practical.
9. We follow clear safety steps, with no people or pets in the area during ozone treatment.
10. We offer related services such as mosquito fogging for riverbanks where water is still standing.

Before and After: A Boatyard Recovery

Customer Voice (Example Scenario)

"I was going to hose everything down and open the next day. The team had us move the fuel drums and thinners out and soak up the oil properly first, then they fogged the workshop and ozone-treated the storeroom and rest room. Now my guys can take their lunchtime nap in the rest room again, and customers collecting their boats don't complain about musty cushions."

— Witthaya, boatyard owner, Bang Pa-in (an illustrative scenario based on typical site situations)

Frequently Asked Questions

Q: Can ozone remove the smell of fuel oil?
A: Ozone can reduce musty smells and some lingering odors, but it is not a way to clean up an oil spill. The oil must be collected and absorbed first, and flammable materials must be removed and the room ventilated until no vapor remains before any ozone treatment.

Q: Our workshop is open at the front. Can it be ozone-treated?
A: Ozone works best in enclosed spaces. An open workshop is treated mainly with disinfection fogging, while the storeroom, office and rest room, which can be sealed, receive ozone treatment.

Q: Can moldy boat cushions be used again after ozone treatment?
A: If the cushions were submerged and the foam absorbed dirty water, they usually need new filling or should be discarded. Cushions that stayed above the water but smell musty can be freshened as part of the room treatment.

Q: Are life jackets that sat in floodwater still safe?
A: Inspect them according to the manufacturer's guidance. If the shell is torn, the foam is deformed or the buckles are damaged, replace them. They are life-saving equipment.

Q: Can mechanics keep working during ozone treatment?
A: Not in the zone being treated. There must be no people, pets or plants there, and it must be ventilated until safe before anyone returns.

Q: Do we need to empty the storeroom completely before ozone treatment?
A: Not always. Items that are sound and simply smell musty, such as dry canvas or cushions that stayed above the water, can often stay in the room. Fuel, thinners, rubber spare parts, electronics and anything you plan to discard should be moved out first. Our team will agree the list with you during the survey.

Q: Do you cover areas outside Bang Pa-in?
A: Yes. We work across Phra Nakhon Si Ayutthaya, Pathum Thani, Bangkok and nearby provinces. Contact us to check scheduling for your location.

Get Your Yard Ready to Welcome Boats Again

Talk to the WHD team about disinfection fogging for your workshop and ozone treatment for your storeroom, office and mechanics' rest room in Bang Pa-in and nearby areas.

See Disinfection Service — Click Here

Book Ozone Treatment — Click Here

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

Related Links

• Ozone treatment for odors and chemical residue
• Master Ozone Generator
• CHEMGENE HLD4H disinfectant spray
• All articles

Health reference: World Health Organization (WHO): Floods · Department of Disease Control, Thailand