A Story From the Field: Teacher Praphan's Reading Room by Khlong Bangkok Noi

Khru Praphan is a retired Thai-language teacher who lives in a two-storey wooden house down a narrow soi, a short walk from Khlong Bangkok Noi. Of all the rooms in that house, the one he loves most is the reading room on the ground floor. Three of its walls are lined with glass-fronted teak cabinets, added one at a time over the decades as his collection kept growing. Inside are hardback novels from an older generation of Thai writers, the classic literature he taught to students for thirty years, weekly magazines he had bound into yearly volumes, and dozens of notebooks filled with his own handwriting: lesson plans, poems, and notes on the books he read.

When the canal began to spill into the soi, his son helped him carry the books from the lowest shelves up to the bed and the table on the second floor. But there were simply too many to move in one night. Water entered the reading room to about mid-shin height and stayed for nearly a week. The bottom two rows of every cabinet sat underwater. The upper shelves never touched the flood, yet they spent those days inside a closed, humid, warm room with no air moving at all.

On the day the water finally drained away, Khru Praphan opened the door and simply stood still for a moment. The smell that rolled out was not the familiar, comforting scent of old paper. It was a heavy, damp mustiness mixed with the smell of river mud. The spines on the bottom shelves had swollen so much that the books were wedged together. The cloth covers of a set of classic literature were dotted with patches of white, fuzzy growth. A grey film clung to the inside of the cabinet glass. And when he pulled out a novel from the third shelf, a shelf the water never reached, he still found small brown spots scattered along the edges of the pages.

His granddaughter, who had come to help clean up, started sneezing and rubbing her nose after less than an hour in the room. Khru Praphan sat down with one of his notebooks, its ink bleeding into the wet pages, and said quietly, "These are things you can never buy again." The question his family now had to answer was simple to say and hard to solve: do we start with the books or with the room? And what can we do ourselves, and what must go to someone who really knows what they are doing?

Why Home Libraries and Bookcases Grow Mold Faster Than Other Rooms

Many families are surprised at how quickly a reading room deteriorates compared with a kitchen or a living room that saw the same depth of water. There are clear reasons for this, and understanding them helps you make better decisions in the first few days.

• Paper is excellent food for mold. Paper, cloth covers, binding glue, leather and many traditional bookbinding materials are organic. Once humidity stays high for days, mold can feed on them almost immediately.
• Books wick water upward. Even if only the bottom edge of a book sat in water, moisture climbs through the paper fibres much higher than you can see. A book that looks dry on the top half may still be damp inside.
• Glass-fronted cabinets become humidity boxes. The same tight doors that keep out dust in normal times trap water vapour after a flood. That is why books on upper shelves, which never touched the water, can still develop spots.
• Wood releases moisture for days. Solid timber that has been soaked slowly gives its moisture back to the air inside the cabinet. The shelves themselves keep feeding the problem long after the flood has gone.
• Tightly packed shelves block airflow. Collectors tend to fill every centimetre of space. The tighter the books are packed, the harder it is for moisture between them to escape.
• Walls, floors and corners behind the cabinets stay wet. The plaster or timber wall behind a heavy bookcase is often the last place to dry and the one place nobody looks. It quietly becomes a reservoir of mold spores that drift back into the room.

This is why recovering a home library has to be treated as two separate tasks that still need to happen together. The first is the books, which are valuables that need careful handling by specialists. The second is the room, the environment the books will return to, which must be clean, dry and free of mold before anything valuable goes back on the shelves.

The Damage Goes Far Beyond a Few Spoiled Books

Health. Every time someone opens a moldy book or moves a damp cabinet, spores are released into the air. For many people this means sneezing, an itchy nose, irritated eyes, or a flare of allergy or asthma symptoms. Older family members who spend long hours reading in the room, like Khru Praphan, need extra care. On top of the mold, the floodwater and mud that entered the room may have carried germs from sewage and drains. That brings risks of diarrhoeal illness, skin infections and leptospirosis, especially when people clean up with cuts on their hands or feet. Protective gloves, boots and a well-fitting mask are not optional during clean-up.

Value and memory. A collection built over a lifetime often contains first editions, signed copies, out-of-print titles and handwritten notebooks that exist nowhere else. It is hard to put a price on these items, and the wrong treatment, such as drying them in strong sunlight or wiping them with household chemicals, can cause damage that cannot be undone.

Time. Mold does not wait for you to be ready. The longer the room stays damp, the further the growth spreads, from one book to the next, from the bottom shelf to the top, and from the reading room into the hallway. Decisions made in the first two or three days after the water recedes matter more than anything done weeks later.

Peace of mind. A room that used to be the quietest, happiest corner of the house becomes a room nobody wants to enter. The musty smell drifts into other rooms, and every walk past the door is a reminder of what was lost. For an older person whose daily routine revolves around reading, that loss of a familiar space can be as hard as the damage itself.

Treasured Books: Be Clear About What You Can Do and What Belongs With a Specialist

Let us be direct about one thing: World Health Disinfection (WHD) does not repair or conserve books. Rescuing old books, rare editions and handwritten notebooks is skilled work that belongs in the hands of specialists, such as book repairers and binders, paper and document conservators, and experienced antiquarian booksellers who know how to assess condition. What WHD does is look after the room: making it clean, disinfected and free of musty odors, so that the books, once they have been cared for properly, come back to a safe place.

What homeowners can safely do

• Wear a fine-filter mask, gloves and boots every time you enter the room.
• Photograph every cabinet and shelf from several angles before you move anything. These photos help you keep records and explain the situation to a specialist.
• Sort the books into groups: soaked, damp but without visible mold, visibly moldy, and dry. Keep each group in a separate area.
• Place visibly moldy books in separate bags or boxes so that spores do not drift onto clean books.
• Make a list of the titles that are rare, signed, or deeply meaningful to the family, so a specialist can look at those first.
• Move the books out of the flooded room to a drier, well-ventilated space while you wait for advice.

What you should not do with valuable books

• Do not pull apart pages that are stuck together while they are wet.
• Do not dry them in strong sunlight, blast them with a hot hair dryer, iron the pages, or put them in a microwave.
• Do not wipe or spray bleach or household cleaners onto paper.
• Do not brush mold off by hand inside a closed room, because the spores will spread everywhere.
• Do not put the books back into the same cabinets until both the books and the room have been dealt with.

A specialist can tell you which volumes should be dried in which way, which ones need mold cleaned off with proper tools and containment, and which ones are worth re-spining or rebinding. For ordinary books that can easily be bought again and are badly damaged, some families decide to let them go, simply to remove a source of mold from the house. That is a personal decision, and there is no wrong answer as long as the moldy items do not stay in the living space.

A Simple Order of Work for the First Week

Families often feel overwhelmed because everything seems urgent at once. A clear order of work makes the job manageable and protects both the books and the people doing the work.

1. Days one and two: make the house safe, check the electrics with a qualified electrician, photograph the room, and move the books out into sorted groups.
2. Days two and three: contact a book specialist about the most valuable volumes and notebooks, and follow their advice on how to store them in the meantime.
3. Days three to five: remove mud, clean the floor and open the room to dry, keeping cabinet doors open so the timber can breathe.
4. After the room is clean: book a survey for disinfection fogging and ozone treatment, so the room is ready long before the books come back.

Following this order means the valuable items are protected first, the room is treated second, and nothing precious is ever exposed to treatment or put back into a contaminated space.

Why the Usual Fixes Fall Short in a Reading Room

• Pouring bleach around the room. Bleach may lighten the stains you can see, but it does not soak into cabinet timber or wall joints where mold hides. Its fumes irritate the airways, and a single splash on a book can ruin the paper.
• Running fans all day. Fans do speed up drying, but if mold is still present they also blow spores around the room and into neighbouring rooms. Air movement without cleaning simply relocates the problem.
• Air fresheners and scented candles. These mask the smell for a few hours. The source of the odor, the mold and the residue left by muddy water, is still there.
• Repainting straight away. Paint applied over a wall that is still wet will bubble and peel, and the mold underneath comes back through the new coat sooner than people expect.
• Putting books back too soon. Even after books have been carefully treated by a specialist, returning them to a cabinet and room that still hold spores and moisture puts them at risk of growing mold all over again.

The common thread is that each of these fixes tackles one symptom, whether colour, smell or dampness, without dealing with the whole room as a contaminated environment. A reading room needs a method that reaches every surface and the air itself.

The Solution: WHD Treats the Room With Disinfection Fogging and Ozone

Once the books have been moved out and sent to specialists, what remains is the room with its empty cabinets and shelves. This is exactly where the disinfection service and the ozone treatment service from World Health Disinfection can do their best work.

Disinfection fogging uses CHEMGENE HLD4H disinfectant applied through an ultra-low-volume (ULV) fogger. The fine droplets drift into cabinet corners, shelf grooves, the gap behind the bookcases, wall corners and the floor, all places that a cloth or brush struggles to reach. This reduces germs on surfaces contaminated by floodwater and mud.

Ozone treatment uses a professional ozone generator to release ozone gas into the sealed room for a set period. Ozone helps deal with mold spores floating in the air and resting on surfaces, and it breaks down the molecules responsible for musty odors. The result is air that is genuinely fresher, not just perfumed.

Our step-by-step process for a home library

1. Site survey. Our team checks the flood line, visible mold, the condition of the wooden cabinets, the wall behind them and the overall dampness of the room.
2. Planning with the family. We confirm that all books, notebooks and other valuables have been moved out of the room or sent to specialists before any treatment begins.
3. Clean-up advice. We advise on removing mud, cleaning floors and drying the room so it is ready for treatment.
4. Disinfection fogging. We fog the empty cabinets, shelves, walls, floor and every hidden corner.
5. Ozone shock treatment. We seal the room and run ozone at a dose and duration suited to the space. Sensitive electronics such as a desktop computer or a record player are removed or covered beforehand.
6. Ventilation. Doors and windows are opened and the room is ventilated thoroughly before anyone goes back in.
7. Re-check. We check the smell and the spots where mold used to be, and advise on humidity control before the books return to the shelves.

10 Reasons to Disinfect and Ozone-Treat Your Reading Room After a Flood

1. It reduces mold spores in the air and on surfaces before your restored books go back on the shelves, with our ozone treatment service.
2. It disinfects floors, walls and cabinets that were in contact with floodwater and mud, through our disinfection service.
3. Fine fog reaches behind cabinets, into shelf grooves and up to ceiling corners that are hard to clean by hand.
4. It breaks down musty and muddy odors at the source instead of covering them for a few hours.
5. It lowers the chance that books already cared for by specialists will grow mold again.
6. It helps older family members and allergy sufferers use the room comfortably again.
7. It uses CHEMGENE HLD4H, a disinfectant used for surface disinfection work.
8. Our team plans with you, so valuables always leave the room first and the room is treated second.
9. It stops the musty smell from the reading room spreading through the rest of the house.
10. You get practical humidity-control advice to keep the room ready for books in the long term. Read more about residential ozone disinfection.

A Word From the Family

"At first we planned to dry the books in the sun and put them straight back. I'm glad we talked to the team first. They told us honestly that old books need someone who specialises in them, and that their job was the room. My father's notebooks are with a book repairer now, the room doesn't smell any more, and he says he's just waiting for the day his books come home."

— Khru Praphan's son (a story from the field), Bangkok Noi

Frequently Asked Questions

Q: Can WHD ozone-treat my books?
A: WHD does not treat the books themselves. Valuable books, rare editions and handwritten notebooks should be assessed by old-book specialists or paper conservators. Our team treats the room, the cabinets and the empty shelves.

Q: Can a teak cabinet that sat in floodwater still be used?
A: If the structure is still sound and the wood has not swollen or rotted badly, clean it, let it dry completely, and have it fogged and ozone-treated along with the room. If the timber is soft or the hinges are badly damaged, ask a carpenter for advice.

Q: Do I need to wait for the room to dry before booking?
A: Remove the mud and do a basic clean first. During the survey our team will advise when the room is ready for disinfection and ozone treatment.

Q: Can the family stay in other rooms while the ozone is running?
A: The treated room must be sealed, with no people, pets or plants inside. Our team will assess whether other parts of the house need to be kept clear or whether the family should step out temporarily. The room must be ventilated properly before re-entry.

Q: When can the books go back on the shelves?
A: When the specialist confirms the books are dry and ready, and the room has been fogged, ozone-treated and ventilated. Leave a gap between the cabinets and the wall, and avoid packing books too tightly.

Q: How do we stop the reading room from getting musty again?
A: Open the cabinets regularly to air them, run a dehumidifier during the rainy season, avoid placing cabinets against walls that have been damp, and watch for smells or small spots early so you can act before they spread.

Q: Do you also cover other parts of Thonburi?
A: Yes. Contact us with your location and a description of the room, and we will arrange a survey for Bangkok Noi and nearby areas on the Thonburi side.

Get Your Reading Room Ready to Welcome Your Books Home

Talk to the WHD team about disinfection fogging and ozone treatment for your home library, bookcases and shelves in Bangkok Noi and nearby areas.

Book Ozone Treatment – Click Here

See Disinfection Service – Click Here

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

Related Links

• Residential ozone disinfection
• Ozone odor and chemical residue removal
• Dust mite removal service
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Health reference: World Health Organization (WHO): Floods · Department of Disease Control, Thailand