After the Flood — A Safe, Step-by-Step Guide to Cleaning, Drying and Repairing a Thai Home, and Claiming Insurance

For families whose homes flooded, relief when the water recedes often turns to dismay at the state of things: mud on floors, soaked furniture, tide-marked walls and a musty smell in every room. Many don't realise that the post-flood period is accident-prone — shocks from wet wiring, injuries from sharp debris and illness from contaminated water and mud. Recovery should follow a sequence with safety first.

Step One: Safety Before Entering

1. Switch off at the main breaker — if the board is wet or still in water, don't touch it; call the electricity authority or an electrician.
2. Check the structure — new cracks in columns or beams, sunken floors or leaning walls mean stay out until an engineer inspects.
3. Watch for dangerous animals — snakes, centipedes and insects shelter indoors from floods; probe with a stick before lifting things.
4. Wear protection — rubber boots, gloves, mask and eyewear, as mud may contain sewage and chemicals.
5. Beware cooking gas — if you smell gas, leave and call a professional.

Step Two: Document the Damage

Before cleaning or discarding anything, photograph and video every room showing the water line on walls, structural damage, furniture, appliances and belongings. Keep receipts or proof of purchase for valuables where available and list damaged items. This evidence is essential for insurance claims and for applying to government agencies or local authorities offering disaster assistance.

Step Three: Clean and Sort

Item	Approach
Mattresses, pillows, carpets, fabric sofas	Mostly discard — they absorb contaminated water and grow mould easily
Plywood and particleboard furniture	Usually swells and warps permanently; consider discarding
Solid wood, metal, plastic furniture	Wash, disinfect and dry; often reusable
Electrical appliances	Don't plug in immediately; have them checked
Food and medicines touched by floodwater	Discard all
Important documents	Air-dry, copy, and contact agencies for replacements if damaged

Shovel mud out while still damp — far easier than once it hardens. Wash floors and walls with clean water, then wipe with disinfectant per product directions. Never mix different cleaning products; toxic gases can result.

Step Four: Dry the House Completely

This is the step people rush most, and it causes long-term problems. Soaked rendered brick walls take weeks to dry fully. Open doors and windows, run fans and dehumidifiers. Gypsum partition walls that were submerged usually need the wet sections cut out and replaced, as the core rots and grows hidden mould; wet insulation in walls or above ceilings should also go. Swollen timber or laminate floors usually need lifting. Don't repaint or re-wallpaper until walls are truly dry, or the finish will blister and peel within months.

Step Five: Electrics and Plumbing

Have a qualified electrician inspect the entire system before switching back on. Submerged sockets, switches and cables may need replacing, a flooded consumer unit should be thoroughly checked or replaced, and RCDs tested. For plumbing, check pumps, storage tanks and septic tanks, which floodwater may have entered and which may need cleaning.

Insurance and Assistance

Check whether your policy covers flood or natural disasters — some basic fire policies don't. Notify the insurer as soon as possible, submit your evidence, and where feasible wait for the loss adjuster before removing large items. For government assistance, follow local-authority announcements on registering as a disaster victim.

Preparing for Next Season

Use the repairs to reduce future damage: raise sockets and the consumer unit, choose water-resistant ground-floor materials such as tiles instead of timber, fit non-return valves on drains, and consider insurance that covers flooding.

FAQ

DIY or hire a company?

General cleaning can be DIY, but electrical work, structural repairs and removing heavily mouldy walls should be done by professionals for safety and proper standards.

What about a flooded car?

Don't start it — water in the engine can cause severe damage. Notify your motor insurer and have it inspected at a service centre.

Buying a second-hand home that flooded before — what should I check?

Electrics, walls that may hide mould, floors that swelled, and structural soundness. Ask about repair history and have an inspector check thoroughly.

Conclusion

Post-flood recovery starts with safety: document damage before cleaning, sort belongings sensibly, dry the house fully before cosmetic repairs, have electrics checked before use, and use the opportunity to reduce future damage. Read about flood-risk maps and rainy-season home checks on the MyProperty blog.