A Story From the Field: When a Showroom That Smelled of New Wood Turned Musty Overnight

Khun Prasert has run a furniture and mattress store in Phra Pradaeng District, Samut Prakan, for almost twenty years. The business occupies three shophouse units. The ground floor is a showroom of sofas, bed frames and mattresses, the second floor displays curtains and pillows, and the back of the building is a warehouse where stock is kept wrapped in plastic. In late September 2026, a high tide on the Chao Phraya River combined with days of heavy rain. Water came into the store about a hand-span deep and stayed for several days.

His staff managed to lift many mattresses and sofas onto pallets in time. But when the water drained away, what Khun Prasert found made his heart sink. The wooden legs of the sofas had soaked up water and were stained. The bottom row of mattresses in the warehouse was wet at the corners. Display curtains hanging close to the floor had mold spots creeping up their hems. Worst of all was the smell. The showroom, which used to smell of new timber and fresh fabric, now had a constant damp, musty odor hanging in the air, even though most of the stock on the higher shelves had never touched the water.

Two days after reopening, a young couple came in to choose a mattress for their child's new bedroom. As they walked in, the wife lifted her hand discreetly to her nose, then asked, "Have these mattresses been in the flood?" That single question made Khun Prasert realize something important. Even if the products were undamaged, as long as the smell remained, customers would not feel confident buying.

His situation is shared by many retailers along the riverbank this year: bedding shops, curtain makers, rattan and teak furniture sellers, upholstery workshops and second-hand furniture dealers. Their stock is valuable, bulky and made almost entirely of materials that soak up moisture and odor like a sponge.

The Problems Furniture and Mattress Stores Face After the Water Recedes

1. Porous products absorb odor and moisture

Mattresses, fabric sofas, pillows, curtains and rugs are made from foam, synthetic fiber, textiles and wood. All of these are porous and absorb humidity from the air extremely well. Even if a product never sat in floodwater, several days of very high humidity inside the store allow musty odor molecules and mold spores to work their way into the material. The product then slowly releases that smell for weeks, especially when the weather is warm and humid.

2. Hidden mold in the warehouse and under plastic wrap

Many retailers assume that stock wrapped in plastic is safe. In reality, wrapping with small holes or tears traps moisture inside, creating something close to a mold incubator. Items stacked directly on the floor or against a wall that wicked up water are most at risk. Black spots on fabric or foam are often discovered only when a product is unwrapped for delivery, which is the most damaging moment possible for the store's reputation.

3. Health of customers and staff

Airborne mold spores trigger allergies, sneezing, blocked noses and asthma, especially in children and older people, who are often exactly the people who will sleep on the mattresses and pillows being sold. Floors and furniture legs that touched floodwater may also carry bacteria such as E. coli or Leptospira, the cause of leptospirosis. Staff who lift, move and clean stock every day share that exposure.

4. Stock value and customer confidence

Mattresses and sofas are high-value items. If you have to discount them because of the smell, or if customers return them after delivery, the loss can be many times greater than the cost of treatment. In a close-knit community like Phra Pradaeng, word of mouth travels fast, and a rumor that "that shop's stock was flooded" can affect sales for a long time.

What Stores Usually Try, and Why It Falls Short

Air freshener sprays and charcoal odor absorbers. These can soften the smell in a small area, but they cannot handle odor embedded in dozens of mattresses and hundreds of meters of curtain fabric. Perfume can also cling to fabric, making customers wonder what is being covered up.

Running fans to air the stock. Ventilation helps dry the surface, but the foam and fibers inside often stay damp. Fans do not kill spores that have already settled into the material.

Wiping with bleach. Bleach can discolor fabric and leather, so it cannot be used on products for sale. And no customer wants a new mattress that smells of chlorine.

Carrying stock outside to sun-dry. Sunlight helps a little, but it is impractical for a large inventory, risks damage during handling and can fade certain fabrics. It also exposes stock to dust and sudden rain showers, which are common in October.

In short, these methods treat the surface of a few items. They do not address the air in the store, the structure of the building or the hundreds of products sitting in the warehouse.

Why Stores in Phra Pradaeng Need to Act Quickly

Phra Pradaeng sits inside a great bend of the Chao Phraya River, the loop that also encloses the green area known as Bang Krachao, and it lies close to the river mouth. When high sea tides coincide with run-off from upstream, water levels rise and fall with each tidal cycle. Shophouses on the main roads and in the side lanes may see water come in, drain away and come back again several times. Moisture builds up in walls and floors for much longer than in places that flood only once.

The air near the river and the sea is also naturally humid, so stock that has already absorbed moisture dries more slowly here than elsewhere. Furniture and bedding retailers in this area should act early, before mold spreads from one item to the next in a crowded warehouse. The longer damp stock sits together in a closed space, the more likely a localized problem becomes a store-wide one.

Finally, Phra Pradaeng's customers include many families who have just been through the floods themselves and are replacing damaged mattresses and sofas at home. They are particularly sensitive to any sign of damp. A store that can show it has dealt with the problem properly has a real opportunity to win their business.

The Solution: Ozone Treatment Plus Chemgene HLD4H Disinfection by World Health Disinfection

World Health Disinfection (WHD) has designed a service for retailers whose stock is mostly porous material, with a focus on tackling odor and mold without wetting the products.

The core: ozone shock treatment. Ozone is a gas, so it penetrates foam, fabric fibers and the joints of furniture without using any liquid. Products are not wetted again. Ozone helps destroy mold spores and breaks down embedded odor molecules, so the smell is reduced at its source rather than masked by fragrance.

Supporting step: disinfection fogging with Chemgene HLD4H. This is applied to floors, walls, shelving, pallets, furniture legs that touched floodwater and the warehouse structure, using a light ULV mist. Chemgene HLD4H is a disinfectant used in medical settings. It acts against bacteria, viruses and fungi and does not have a chlorine smell. The team avoids spraying directly onto fabrics and leather that are sensitive to moisture.

This division of labor is what makes the approach suitable for retail stock. The liquid disinfectant goes where floodwater actually was, on hard surfaces. The gas goes where odor and spores are hiding, inside soft products, without leaving them damp.

Realistic expectations. It is worth being clear about what ozone does and does not do. It reduces odor and helps destroy mold spores and other microorganisms on and within materials. It does not remove physical stains, repair swollen particleboard, dry out a soaking-wet mattress or make sewage-contaminated foam safe to sleep on. That is why the survey and the sorting step come first. Treatment is applied to the stock and spaces where it can genuinely make a difference, and the store gets honest advice about items that should be taken out of sale. Owners tell us this clarity is valuable in itself, because it turns a vague, worrying problem ("everything smells, what can we sell?") into a concrete plan with a list of saved stock, a list of written-off stock and a showroom that smells clean again. It also means you can answer customers' questions directly, with confidence, instead of hoping they will not ask.

Our step-by-step process for showrooms and warehouses

1. Survey and sorting: The team checks the flood line, product condition and mold spots, and advises on separating stock that was directly submerged, which should be written off, from stock affected only by humidity and odor.
2. Clean-up advice: Wash mud from floors and walls, raise stock onto pallets and remove damp plastic wrapping so products can breathe.
3. Structural disinfection: Chemgene HLD4H is fogged over floors, lower walls, shelving and furniture legs that touched water.
4. Ozone treatment: The showroom or warehouse is sealed zone by zone. Stock is arranged with gaps so the gas can circulate, and treatment runs according to space volume and stock density, with no people, pets or plants inside.
5. Ventilation: Doors are opened and fans run until the ozone has broken down into oxygen, before staff re-enter.
6. Re-check: The team reviews odor levels with the owner. If some zones still smell because certain items absorbed a lot of moisture, the team advises on further drying, a second treatment or additional sorting.

Product by Product: What to Expect

Different products respond differently to damp and to treatment. Understanding this helps you plan and set realistic expectations.

Mattresses. Thick foam and fiber layers hold moisture deep inside, which is why a mattress can smell musty even when its cover looks perfect. Ozone treatment is well suited to reducing the odor and spores in mattresses that were affected by humidity. Stand them on their sides with space in between during treatment so the gas can reach all surfaces.

Fabric sofas and armchairs. Cushions, padding and the timber frame all absorb odor. Remove loose cushions and stand them separately. Wooden legs that touched water are cleaned and disinfected, while the upholstery is handled by ozone.

Curtains and fabric rolls. Curtains have a very large surface area, so they collect odor quickly. Hanging them loosely, rather than folded or rolled tightly, allows ozone to reach between the layers. Hems with visible mold should be assessed individually, since heavy staining may not disappear even when the mold is treated.

Pillows, bolsters and bedding sets. These are often sold in bags or boxes. Open the packaging during treatment, then repack once everything is dry and odor-free.

Solid wood, rattan and metal furniture. Surfaces are easier to clean, but joints, drawer interiors and the underside of tables can trap smell. Open drawers and cabinet doors before treatment so air and ozone can circulate inside.

Rugs and carpets. Rugs that were submerged are very difficult to restore and usually should be discarded. Rugs affected only by humidity can be unrolled and treated with the rest of the stock.

10 Reasons Furniture and Mattress Stores in Phra Pradaeng Should Choose Ozone Treatment

1. Ozone treatment reaches odors embedded in foam and fabric without wetting the stock.
2. Protect the value of stock that was affected only by humidity, avoiding odor-driven discounts.
3. Reduce mold spores in the warehouse before they spread to other products.
4. Disinfection fogging treats floors, walls and shelving that touched floodwater.
5. Chemgene HLD4H leaves no chlorine smell on your products.
6. Your showroom smells clean again, and customers feel comfortable walking in.
7. Fewer returns due to odor or mold spots after delivery.
8. Protect the health of staff who handle stock every day.
9. Large showrooms and warehouses can be treated in a short time, zone by zone.
10. Add a dust mite removal service for display mattresses and sofas that customers test.

Before and After

What Store Owners Tell Us

"Most of our stock never went under water, but the smell got into everything. Customers noticed straight away. After the showroom and warehouse were ozone-treated, the smell dropped so much that even our staff commented on it. For the items that really had been submerged, the team advised us to separate them rather than force a sale. That gave us peace of mind."
— Furniture and mattress store owner, Phra Pradaeng District (a representative scenario from the field)

Honest Stock Sorting: A Practical Guide

Ozone treatment helps deal with odor and mold in products affected by humidity. It is not a way to turn genuinely flood-soaked goods back into new stock. For your customers' safety and your store's reputation, we recommend the following approach:

• Directly submerged items, such as mattresses where water reached the inner foam or fabric sofas soaked up to the seat, should be written off or sold with their condition clearly disclosed, because floodwater can carry sewage deep into the material.
• Items affected only by humidity and odor, such as mattresses on upper racks or curtains hanging above the water line, are good candidates for ozone treatment before sale.
• Wooden and metal-frame furniture whose legs touched water can be cleaned and disinfected, but check for swollen particleboard and rust before putting them back on display.
• Stock still in plastic wrap should be opened and inspected item by item. Condensation on the inside of the plastic means the product has absorbed moisture and needs to be aired and treated before re-wrapping.

Being open with customers, for example by explaining that the showroom and warehouse have been ozone-treated and disinfected and that damaged items have been removed from sale, builds far more trust than staying silent. Many customers will appreciate the honesty and remember it when they next need furniture.

Keeping stock fresh after treatment

After treatment, keep stock off the floor on pallets, leave a gap between products and walls, and let air circulate in the warehouse during the day. Avoid re-wrapping items until they are completely dry. Check the lowest rows and the corners of the warehouse every week for the next month. If you notice a new damp patch on a wall, find and fix the source quickly. These habits help the results of the treatment last through the rest of the rainy season. For the display floor, a small dehumidifier in the mattress section and regular wiping of hard surfaces with a disinfectant spray will help keep the showroom fresh while customers come and go.

Frequently Asked Questions

Q: Will ozone fade sofa fabric or mattress covers?
A: When treatment is carried out at a concentration and duration suited to the space, it generally does not damage ordinary fabrics. The team assesses special materials such as genuine leather, some natural latex and silk, and advises on arrangement before treatment.

Q: Is there a difference between latex and spring mattresses?
A: Natural rubber can be more sensitive to ozone than other materials. The team may recommend placing latex products in a separate zone or adjusting the treatment time.

Q: How long will the store need to close?
A: It depends on the size of the showroom and warehouse. Many stores choose to treat one zone at a time so that other areas can stay open. The team plans the schedule with the owner.

Q: Will one treatment remove all of the smell?
A: The smell will be clearly reduced. Products that absorbed a lot of moisture may need further drying and a second treatment. The team assesses this during the re-check.

Q: Can you spray disinfectant directly onto mattresses?
A: For products intended for sale, the team focuses liquid disinfection on structures, floors and shelving, and relies mainly on ozone for the products themselves, so they are not wetted again.

Q: We also have a delivery truck that carried damp stock. Can that be treated?
A: Yes. Enclosed delivery trucks and storage containers are small, sealed spaces that respond well to ozone treatment. Mention them during the survey so they can be included in the plan.

Q: Which areas of Samut Prakan do you serve?
A: Phra Pradaeng, Mueang Samut Prakan, Bang Phli, Bang Bo, Bang Sao Thong, Phra Samut Chedi and nearby areas of southern Bangkok.

A Fresh Showroom and Stock Ready to Sell

Talk to World Health Disinfection about ozone treatment and disinfection for furniture, mattress, sofa and curtain stores and warehouses in Phra Pradaeng, Samut Prakan. Send a few photos of your showroom and warehouse by LINE, and the team can give you initial advice on sorting and treatment planning before the site survey.

Book Ozone Treatment – Click Here

View Disinfection Service – Click Here

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

Related Services and Reading

• Ozone odor and chemical residue removal
• Residential ozone disinfection
• Master Ozone Generator
• All articles

References: WHO – Floods fact sheet and the Department of Health, Thailand Ministry of Public Health.