A Story From the Field: Too Much Information, No Idea Where to Start

Ann is a 40-year-old office worker who lives in a detached house on the outskirts of Bangkok with her husband, their two children and her mother. After the 2026 floodwater went down, she spent every night on her phone: reading articles about mold, watching videos on how to clean a flooded house, and scrolling through advice in the neighborhood group chat until well past midnight.

The more she read, the more confused she became. One source said to repaint straight away; another said to wait a month. Some people swore by bleach; others warned it was dangerous. Ann ended up with a very long to-do list, but no idea which jobs had to come first, which could wait, and which she should not be doing at all.

What Ann needed was not more information. She needed a clear order. That is what this article is for. It brings every step of post-flood home recovery together on a single page, arranged by time, with links to the services and in-depth articles for each topic. Bookmark it, share it with your family, and come back to it as you work through the recovery.

Why the Order Matters More Than Speed

Most families want their home back to normal as quickly as possible, so they try to do everything at once. But post-flood recovery has steps that need to happen in sequence. Skip one, and the work you have already done may have to be undone.

• Health: Disinfect before the mud is gone, and the disinfectant cannot work properly through the layer of dirt. Germs remain, and the family is still at risk of diarrheal illness and skin infections.
• Money: Paint before the walls are genuinely dry, and mold grows back under the new paint, so you pay for the paint job twice.
• Time: Mask a smell with air freshener instead of finding its source, and you can lose weeks before you discover what the real problem is.
• Safety: Switch on lights or plug in appliances before an electrician has checked the system, and you risk short circuits or worse.

The steps below follow the order that works in most homes. Timings are approximate, because every house dries at a different pace depending on how high the water rose, how long it stayed and what the walls are made of.

Step 0: Before You Go In, Safety Comes First

• Electricity: If the breaker box or sockets were underwater, do not switch the power back on yourself. Have an electrician check it first, and never touch electrical equipment while standing on a wet floor.
• Gas: If you smell gas, leave immediately. Do not touch any switches and do not light anything. Call 199 once you are outside.
• Structure: Look for large cracks, sunken floors or doors that have twisted out of shape. If you are unsure, have a builder assess the house before you move around inside.
• Dangerous animals: Snakes, centipedes and insects often hide in dark corners and piles of belongings. Use a stick to check before reaching in with your hands.
• Protective gear: Wear boots, rubber gloves, a mask and eye protection. Flood mud can carry germs linked to leptospirosis, diarrhea and skin infections.
• Generators: Never run one inside the house or a closed garage. Carbon monoxide has no smell and can be deadly.

Step 1 (Days 1 to 2): Record, Ventilate, Remove Mud, Sort

1. Take photos and video: Record the water line and the damage to the house and your belongings before you move anything. You may need this for insurance claims or assistance applications.
2. Open the house up: Open every door and window you safely can, to let moisture and smells escape.
3. Remove mud while it is still wet: Once flood mud dries, it sets hard and is far more difficult to wash away.
4. Sort your belongings: Make three piles: keep, clean, and throw away. Food, medicines and cosmetics that touched floodwater should all be discarded.
5. Refill the drains: Pour water into every floor drain so the traps can block sewer smells again.

Step 2 (Days 3 to 7): Wash, Dry and Sort Out the House Systems

• Wash floors and walls: Use clean water and ordinary cleaning products. Never mix different cleaning products together.
• Strip out waterlogged materials: Fitted carpet, swollen lower sections of gypsum board, insulation and mattresses that were soaked through usually have to go.
• Dry the building properly: Use fans to push damp air out of the house, and run dehumidifiers. Do not point fans straight at areas where mold is already growing.
• Pipes and septic tanks: If pipes are blocked or the septic tank is overflowing, call a plumber or a septic-emptying service. Never climb into an inspection chamber yourself.
• Drinking water and filters: Replace filter cartridges that were underwater, and drink bottled water until the system has been checked.
• Appliances: Do not plug in anything that was underwater. Have a technician check it first.

Step 3 (Around Week 2): Disinfection Fogging and Ozone Treatment

Once the mud is gone, the house has been washed and it is starting to dry out, it is the right time to disinfect and deal with odors. The exact timing depends on the condition of each home.

• Disinfection fogging: The WHD team uses CHEMGENE HLD4H in a ULV fogger, which turns the disinfectant into a fine mist that reaches corners, the undersides of furniture and places hands cannot reach, treating germs on every surface the water touched.
• Ozone treatment: Rooms are sealed and treated with a controlled dose matched to their size, helping destroy airborne mold spores and break down the musty odor molecules trapped in fabric and porous materials.

Ozone safety: No people, pets or plants can be in the room during treatment. Sensitive electronics, rubber items and artwork are covered or removed, and every room is ventilated before anyone goes back in.

Step 4 (Weeks 3 to 4): Repairs and Restoring Your Belongings

• Repainting and new finishes: Only once a technician has measured the moisture in the walls and confirmed they are dry enough, not just because the surface looks dry.
• Mattresses and sofas you kept: Use our dust mite removal service together with ozone treatment once the house is properly dry.
• Mosquitoes around the house: Standing water in plant pots, gutters and low ground breeds mosquitoes. Consider our mosquito spraying service alongside emptying containers.
• Lingering chemical smells: If the house still smells of cleaning products or fuel, try our ozone treatment for chemical residue odors.

Step 5 (Months 1 to 3): Stop Mold From Coming Back

• Ventilate every day, especially in the late morning when outdoor humidity drops.
• Run dehumidifiers in stuffy rooms and notice whether the tank fills up unusually fast.
• Keep furniture slightly away from walls so air can circulate.
• Do not dry laundry in bedrooms or the living room.
• Check former mold spots every week, and book a follow-up visit one to two weeks after treatment.

This last stage is the one most families skip, because by now the house looks finished. But the rainy season in Bangkok usually continues for weeks after a flood, and a house that is still giving off moisture can grow mold again surprisingly quickly. A few minutes a day of good habits protects all the work and money you have put in.

Quick Table: Keep, Clean or Throw Away?

Who Does What: Your Recovery Contact List

One reason recovery feels overwhelming is that no single person can do everything. It helps to know in advance which professional handles which job, so you call the right people in the right order instead of waiting on the wrong one.

• Electrician: Checks the breaker box, sockets and wiring before power is restored, and inspects appliances that were underwater. This is almost always the first call.
• Gas supplier or technician: Inspects cylinders, hoses and regulators that may have been moved or damaged by the water.
• Plumber or septic service: Clears blocked pipes, empties overflowing septic tanks and checks water pumps and filters.
• Builder or contractor: Assesses structural damage, removes swollen gypsum board and flooring, and later handles repairs and repainting once walls are dry.
• Disinfection and ozone team (WHD): Surveys moisture and mold, carries out disinfection fogging and ozone treatment, and follows up to make sure mold and odors are not coming back.
• Your doctor: For anyone in the family who develops fever, muscle pain, diarrhea, rashes or breathing problems after the flood.

Keep these numbers in one place, alongside the emergency numbers 199 for fire and gas incidents and 1669 for medical emergencies.

Detached House, Townhouse or Condo: What Changes?

The steps on this page apply to almost every home, but the type of building changes where you focus your attention.

• Detached houses: Usually have the most ground-floor space to dry out and the most outdoor areas where water collects. Pay extra attention to the space under the house, garages, outdoor kitchens and garden storage, which are easy to forget.
• Townhouses and shophouses: Long, narrow layouts with windows mainly at the front and back make cross-ventilation harder. The rear kitchen, laundry area and the space under the stairs tend to stay damp longest, so these are where mold most often hides.
• Low-rise condos and apartments: Ground-floor units share drains, corridors and sometimes walls with neighbors. Coordinate with the juristic person or building manager so that shared areas are cleaned and disinfected too; otherwise odors and mold can drift back into a unit that has already been treated.

Whatever kind of home you live in, the principle is the same: remove the water and mud, dry thoroughly, disinfect, deal with odors, and only then repair and redecorate.

A Printable Checklist for the Fridge

Many families find it useful to copy the list below onto a sheet of paper and tick items off as they go. It turns a long, stressful process into something that feels manageable.

• Electrics checked by an electrician
• Gas cylinder and hose checked
• Photos and video of the damage taken
• Mud removed and house washed
• Food, medicines and soaked mattresses discarded
• Drains refilled, pipes and septic tank checked
• Dehumidifiers running, walls drying
• Disinfection fogging completed
• Ozone treatment completed and rooms ventilated
• Wall moisture measured before repainting
• Mattresses and sofas treated for dust mites
• Follow-up check booked for one to two weeks later

If you get stuck on any item, or you are not sure whether a step is finished, send us a photo on LINE. Our team can usually tell you quickly whether it is time to move on to the next step or whether something still needs attention first.

5 Things Not to Do After the Water Goes Down

1. Pour bleach everywhere instead of cleaning, or mix different cleaning products together.
2. Paint over walls that are still damp.
3. Point fans straight at areas where mold is growing.
4. Use air freshener or incense to hide a smell instead of finding its source.
5. Stay in a room during ozone treatment, or go back in before ventilation is finished.

Match the Service to the Problem

• A whole floor flooded and nothing has been disinfected yet: disinfection fogging service
• A musty smell that won't go away, or hidden mold: ozone treatment service, and read about residential ozone disinfection
• Leftover smells from cleaning products or fuel: ozone treatment for chemical residue
• Mattresses and sofas you decided to keep: dust mite removal service
• Mosquitoes multiplying after the flood: mosquito spraying service
• Looking after the house yourself afterwards: CHEMGENE HLD4H disinfectant spray and the Master Ozone Generator

For in-depth articles on specific topics, such as mold on walls, drain smells, flooded mattresses or guides for individual districts, browse our full article library.

What Affects the Scope of Disinfection and Ozone Work

Every flooded home is different, which is why we always survey before recommending a plan. These are the main factors that decide how much work a house actually needs:

• Floor area that was underwater: A single flooded room is very different from an entire ground floor plus a garage.
• How long the water stayed: Water that sat for a week soaks much deeper into walls and furniture than water that drained in a day.
• Building materials: Gypsum board, wood and fabric hold moisture and odor far longer than tiles and concrete.
• How much has already been cleared: A house where mud and damaged materials are already gone is ready for treatment sooner.
• Who lives there: Homes with young children, older people or patients often need extra rooms treated and longer ventilation times.

Telling us about these points when you first call helps us give you useful advice straight away and plan the survey visit properly.

How the WHD Service Works When You Contact Us

1. Initial call and survey booking: We ask how high the water rose, how big the house is and what problems you are seeing, such as musty smells, mold on walls or family members with allergies.
2. On-site survey: We check moisture in the walls, look for visible and hidden mold, and confirm that the electrics and gas have been checked.
3. Preparation advice: We tell you which materials should go first, what should be put away or covered, and which equipment needs to be moved out before ozone treatment.
4. Disinfection fogging: CHEMGENE HLD4H is applied with a ULV fogger across every flooded area.
5. Ozone treatment: Rooms with lingering smells or hidden mold are sealed and treated with a controlled dose.
6. Ventilation and handover: Rooms are ventilated until safe, and we let the family know when they can go back in.
7. Follow-up: We check results after one to two weeks and give advice on long-term care.

Extra Care for Homes With Young Children, Older People or Patients

• Have vulnerable family members stay elsewhere while mud is removed, the house is washed, and fogging and ozone treatment take place.
• Prepare the cleanest, driest room for them first, such as an upstairs room the water never reached.
• Replace mattresses, pillows and blankets that were exposed to water or damp.
• Watch for coughing, sneezing, breathing difficulty, rashes or fever, and see a doctor if any of these appear.

10 Reasons to Let WHD Handle the Disinfection and Odor Steps

1. We survey the house and recommend the order of work that suits its real condition.
2. ULV fogging covers large areas in a short time.
3. We use CHEMGENE HLD4H, a clearly named disinfectant product.
4. Ozone treatment uses a controlled dose matched to room size.
5. Electronics and delicate items are covered or moved before treatment.
6. We advise on which materials to keep, clean or discard.
7. We give clear, practical ozone safety instructions.
8. Additional services are available, including dust mite removal, mosquito spraying and chemical odor removal.
9. Follow-up visits make sure mold and odors are not returning.
10. We serve homes across Bangkok and the surrounding provinces, and we are easy to reach by phone and LINE.

Before and After: When There Is a Clear Order

In the Customer's Words

"What helped most was knowing what to do first and what could wait. Once I had a clear order, I stopped stressing every night, and I didn't waste money on things that weren't needed yet."

— Ann, homeowner on the outskirts of Bangkok (a scenario from our field work)

Frequently Asked Questions

Q: When should I call a disinfection team?
A: After the mud has been removed, the house has had a first wash, and the electrics have been checked. You can call for advice and to plan ahead from day one.

Q: Do I need both fogging and ozone treatment?
A: It depends on the problem. Fogging looks after surfaces; ozone looks after the air and odors. Homes where a whole floor flooded and that still smell musty usually benefit from both.

Q: When can I repaint?
A: Once a technician has measured the walls and confirmed they are dry enough. The time this takes differs from house to house.

Q: Where should my family be during ozone treatment?
A: Out of the treated area completely, along with pets and plants, until the team has finished ventilating.

Q: Someone in the family got sick after the flood. What should we do?
A: See a doctor promptly, especially for fever, muscle pain or diarrhea after wading through floodwater. This article is not medical advice.

Q: Which areas do you cover?
A: Homes in Bangkok and the surrounding provinces. Contact us by phone or LINE to check your area and book a survey.

Bookmark This Page, and Let Our Team Handle the Hardest Steps

Homes in Bangkok and the surrounding provinces are welcome to contact us for advice or to book a survey.

See Disinfection Fogging Service

Book Ozone Treatment

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

Related Pages and Sources

• All articles
• Residential ozone disinfection
• CHEMGENE HLD4H disinfectant
• External sources: WHO: Floods and health, Department of Disease Control, Thailand and Department of Health, Thailand

#FloodRecovery #PostFloodDisinfection #OzoneTreatment #MoldRemoval #MustyOdorRemoval #Disinfectant #DisinfectionService #FloodRecoveryChecklist

Keywords: post-flood home recovery summary, flood recovery checklist, cleaning a house after a flood, post-flood disinfection, ozone treatment, mold removal, Bangkok, Bangkok suburbs 2026