฿1.8M Temple Hall Restoration: 4 Elderly Guests Dizzy at a 19-Man Ordination 9 Days Later, Because of Oil Paint Fumes

An oil paint smell indoors does not simply fade in a few days, especially in a thick-walled ordination hall. Here is what that smell really is, why the usual fixes fall short, and how ozone paint odor removal with the Master Ozone Generator gets a sacred space ready for worshippers again.

A Beautifully Restored Hall, and an Oil Paint Smell Indoors That Nobody Planned For

This story is a composite based on situations we commonly see; names and places are fictional.

If you sit on a temple committee, manage a place of worship, or look after any building that has just been repainted, and you still catch a sharp chemical odor every time you unlock the doors, the story of Uncle Sompong may sound familiar. An oil paint smell indoors lingers far longer than most people expect in a space with little airflow, and on the day a crowd fills the room, a small nuisance can become a very public problem.

Sompong, 64, is the lay steward of Wat Pho Ngam Wanaram, a community temple beside a canal in Thailand's central plains. Its ordination hall, the ubosot, is almost 60 years old. Plaster was flaking and the wooden doors and shutters had faded to bare grain. The abbot hoped the restoration would be finished before two important events after the end of Buddhist Lent: a group ordination of 19 young men, and a Kathin robe-offering ceremony about two weeks later.

Villagers held several fundraising merit-making events and gathered roughly 1.8 million baht. Over three months, builders repaired the roof, re-plastered the walls, and brushed oil-based paint onto all 14 wooden doors and windows, plus the interior pillars and beams. They then applied lacquer over the carved wooden patterns and gilded motifs around the entrance arch. Every step involved mixing paint and cleaning brushes with thinner. The final coat went on just nine days before the ordination.

The day the scaffolding came down, Sompong stood outside admiring the bright white walls against the golden gable and felt a lump in his throat. Then he stepped over the threshold, and a heavy wave of oily, solvent-sharp air hit him so hard he held his breath. The head painter shrugged: "Leave the doors open for a week and it'll be gone." Nobody gave it much more thought.

Nine days later, the smell was milder in the afternoons when every door and shutter stood open. But each morning, when Sompong unlocked the great front doors, the odor that had built up overnight rolled straight out at him. The hall has to be locked at night to protect the Buddha images and temple property, and with thick walls and narrow windows, the air inside barely moves.

Ordination Day: Rain, Closed Shutters, and a Packed Hall

It drizzled from before dawn. More than 150 relatives filed into the hall, many of them grandparents who had waited years to see a grandson take the saffron robes. To keep the rain out, the committee closed nearly every shutter and switched on six floor fans instead. The ceremony ran for almost three hours, with everyone seated on the floor on brand-new carpet, close to walls and pillars that had only just been painted.

About ninety minutes in, Grandma Boonma, 79, went pale and whispered to her daughter that the room was spinning. Soon three more elderly guests asked to be helped outside to sit under the bodhi tree. Some had headaches, one felt nauseous, and several of the ordinands were blinking back tears from stinging eyes. A village health volunteer fanned them and kept a close watch. Thankfully, everyone felt better once they were breathing fresh air outdoors.

Two Weeks Before the Kathin, Worry Spreads Through the Village

That evening the village LINE group lit up: "The paint smell in the hall is really strong. Will our elderly folks manage at the Kathin?" Several older villagers told their families they would make merit at home this year. Meanwhile, the abbot and the senior monks, who chant morning and evening in the hall every day, were noticeably coughing more often.

Three days later, the Kathin sponsors, a group of about 60 people from Bangkok, called Sompong directly. Should they move the ceremony to the open-sided merit hall instead? They had specifically wanted to celebrate the newly restored ubosot. Sompong felt the weight of it. Every baht had come from the faith of ordinary villagers, and the last thing he wanted was for the hall they had built together to become a place where people felt unwell.

Why an Oil Paint Smell Indoors Matters So Much in a Place of Worship

Many people treat paint smell as a temporary annoyance. But in a building that gathers large groups, particularly older people who sit still for hours, an oil paint smell indoors hits several areas at once.

1) Health of worshippers and monks

The fumes from paint solvents and thinner are VOCs (volatile organic compounds). Breathed in an enclosed space, they can cause:

• Headaches and dizziness, plus a heavy, tired feeling, especially after sitting in one spot for a long time
• Eye, nose and throat irritation: stinging, watery eyes, a blocked nose, coughing
• Nausea or an uneasy stomach
• Asthma or allergy flare-ups in people with existing conditions
• Greater sensitivity among older adults, children, pregnant women and people with chronic illness, who are often the core of any merit-making crowd
• Ongoing exposure for monks who use the hall daily, which is something worth keeping as low as possible

2) Unplanned costs

• Moving a ceremony means renting tents and sound equipment and re-arranging the venue
• Air purifier rental, carpet cleaning, and bags of charcoal that barely help
• Committee members' time spent opening and locking doors, watching fans and answering worried calls
• Possibly smaller donations if people decide to stay away

3) The temple's reputation

• Word of elderly guests feeling faint mid-ceremony travels fast through chat groups and social media
• Sponsors from other provinces may hesitate before booking their next ceremony
• A restoration meant to be the community's pride ends up being discussed for the wrong reasons

4) Faith and community trust

• Donors may wonder how carefully the restoration was planned
• Families hesitate to bring grandparents to the temple, and the bond between temple and village loosens
• Committee members feel the pressure, since they answer for both the budget and everyone's wellbeing

What Is That Smell in a Freshly Restored Hall, Really?

The odor greeting Sompong every morning was not just "new building smell". It was a mix of chemical vapors slowly escaping from the materials, known collectively as volatile organic compounds (VOCs). When the total amount in the air is measured, the reading is called TVOC (Total Volatile Organic Compounds).

Oil-based paint: dry to the touch, still releasing vapors

Oil-based paints for wood and metal usually contain petroleum-based solvents. They dry in two stages. First the solvent evaporates until the surface skins over. Then the paint film slowly reacts with oxygen in the air until it fully hardens, which can take several weeks. Throughout that second stage, the coating keeps giving off vapors, even though it feels completely dry.

Thinner and lacquer: the source of that eye-watering sharpness

Paint thinner, used for mixing and cleaning, often contains solvents such as toluene, xylene or acetone, depending on the formula. Lacquer brushed over carved woodwork is also rich in fast-evaporating solvents. Layer it into the countless grooves of a carved door panel and the surface area releasing fumes is many times larger than a flat wall.

Off-gassing: materials soak it up, then breathe it back out

Vapors do not simply hang in the air. They seep into new carpet, floor cushions, curtains, old timber and fresh plaster. As the hall cools overnight, those materials hold on to the chemicals. Once the late-morning sun heats the roof and the temperature inside rises, they release the smell again. That is why the odor seems to disappear and then "come back" every single day.

Why ordination halls trap odors more than ordinary buildings

• Thick walls and narrow windows, designed for stillness, so air moves slowly
• Locked every night, so vapors concentrate by morning
• Large volume and high ceilings, where fumes linger overhead and slowly drift down
• People sit on the floor, right next to carpets and walls that are giving off the smell
• A continuous calendar of rites, so the building cannot simply be shut for a month

Why the Usual Fixes Can't Beat an Oil Paint Smell Indoors

After the ordination, the committee tried every tip people offered. Each helped a little, but none worked fast enough for the Kathin date.

1. Opening doors and running fans all day. Ventilation genuinely helps, but it takes days to weeks. The hall must be locked at night, and on rainy days the shutters cannot stay open, so the smell builds back up by morning.
2. Incense, pandan leaves, lemongrass or air freshener sprays. These only mask the smell while the VOCs stay put. Perfume mixed with paint fumes can make dizziness worse, and incense smoke adds particles to the air.
3. Charcoal, bamboo charcoal, coffee grounds or baking soda. Their absorbing capacity is tiny compared with a hall of several hundred cubic meters. The committee placed 20 bags of charcoal around the room and noticed almost no change.
4. Renting home air purifiers. Household units are sized for small rooms. In a high-ceilinged hall, only a fraction of the air ever passes through the filter, and activated-carbon filters saturate quickly with heavy solvent vapors.
5. Shampooing carpets and wiping walls. This removes dust and grime, but odor that has soaked deep into wood, plaster and carpet fibers keeps re-releasing.
6. Waiting it out. That might work with a month or two to spare. But a temple has daily monastic routines and ceremonies with fixed dates, so waiting is not a realistic option.

The Solution: WHD Ozone Paint Odor & Chemical Residue Removal with the Master Ozone Generator

One night, Sompong's niece Prae, who works in Bangkok, searched online for how to get rid of an oil paint smell inside a building. She found the ozone paint odor and chemical residue removal service from World Health Disinfection (WHD), with photos from real jobs ranging from condo bedrooms and car paint booths to office meeting rooms and chemical plants.

How ozone works

The Master Ozone Generator releases ozone (O₃), mimicking the way nature purifies air. Ozone is a powerful oxidizer: it breaks the molecular bonds of odor molecules, chemical vapors (VOCs) and germs at the source. The smell is destroyed rather than covered up.

After the cycle, ozone naturally breaks down back into oxygen (O₂), so no chemical residue is left behind to wipe away. As a gas, it also reaches places no cloth can, such as the grooves of carved panels, beneath the altar base, or behind scripture cabinets, which makes it well suited to large, detailed interiors.

Measured with TVOC readings, not just a sniff test

What convinced Sompong was that WHD is one of the few providers in Thailand that shows TVOC reduction results measured at real job sites. Readings are taken with an AM1310 meter backed by calibration documents, including a KIMO PT100 SC0110 adjusting certificate and a BR-SMART certificate of calibration. That gave the committee real data to share openly with villagers and sponsors.

Fast, with minimal disruption to monastic life

Treatment is carried out by trained technicians in a closed, unoccupied space. Monks, visitors, pets and potted plants must be out of the area during the cycle. Once the ozone has decomposed and the room has been ventilated, most areas are ready to use within about 2 hours, which makes it easy to schedule around religious activities.

10 Reasons to Choose WHD Ozone Treatment Before an Important Ceremony

1. It destroys odor at the source

Ozone attacks the molecules of paint and thinner vapor directly, unlike incense or sprays that only hide the smell for a while. The air feels noticeably cleaner, not just more fragrant.

2. No chemical residue on sacred objects

When the cycle ends, ozone reverts to oxygen. There is no film or spray mist settling on surfaces, so there is no need to wipe down altar items afterward.

3. Before-and-after TVOC readings

WHD's ozone paint odor removal is backed by readings from a calibrated meter, so committees can explain results to donors and sponsors with confidence.

4. Reaches carvings and high ceilings

The gas spreads through the entire volume of the room, from lofty roof beams to the tiny recesses of carved woodwork that cleaning cloths and purifiers never reach.

5. Ready in about 2 hours

No need to close the hall for days. The work can be booked for a quiet window between monastic activities.

6. Built for large spaces

The Master Ozone Generator suits big interiors such as ordination halls, merit halls, auditoriums, warehouses and factories, with the cycle sized to the real room volume.

7. Technicians assess and protect sensitive items

The team surveys the site first and advises removing or covering sensitive items as needed, such as old artworks or murals, natural rubber, and delicate electronics.

8. Handles many types of chemical odor

Beyond oil-based paint smell, the service covers acrylic paint, thinner, lacquer, epoxy and PU coatings, industrial adhesives, renovation odors, and musty smells or mold in enclosed spaces.

9. Protects reputation and community trust

Booking ozone odor treatment before a ceremony lets worshippers attend in comfort and reduces the chance of an incident that the whole village talks about.

10. Easy to reach, real field experience

Call or message on LINE for advice. The WHD team can recommend a chemical residue removal plan that fits your building.

Before and After Ozone Treatment: The Wat Pho Ngam Ordination Hall

How the WHD Team Works

1. Site survey and baseline TVOC reading. The team assesses room size, materials used and where the odor is strongest.
2. Clear people, pets and plants. Sensitive items are removed or covered on the technician's advice.
3. Seal the area and set up the Master Ozone Generator. Doors and windows are closed and "no entry" signs posted.
4. Run a cycle sized to the room volume. Technicians supervise from outside for the entire cycle.
5. Allow decomposition and ventilate. Nobody re-enters until the ozone has broken down and fresh air has been let in.
6. Re-check TVOC and odor. Before-and-after results are shown to the building manager.
7. Hand back the space. It is typically ready to use within about 2 hours, with aftercare advice.

How the Story Ended: A Kathin Ceremony Everyone Could Sit Through

With the abbot's permission, the WHD team arrived after morning chanting. Technicians took TVOC readings inside the hall, recommended covering the old mural behind the principal Buddha image, and asked for the potted plants to be carried out. Then they sealed the building and started the cycle.

After the cycle and ventilation, they measured again with Sompong watching. The TVOC reading had dropped clearly. The harsh smell that used to greet him every morning was largely gone, leaving only a faint note if you leaned in close to a freshly lacquered door frame. The technicians suggested keeping the shutters open during the day for a while longer.

Sompong posted the before-and-after readings in the village LINE group, and the Bangkok sponsors decided to keep the ceremony in the ubosot. On Kathin day, Grandma Boonma sat in the front row until the final blessing. Sompong came away with a clear lesson: next time, plan for the smell from day one.

Tips to Prevent an Oil Paint Smell Indoors on Your Next Restoration

• Choose low-VOC or water-based products where possible, and ask your painter about durability for exterior woodwork.
• Allow proper curing time, ideally at least 2 to 3 weeks before a major ceremony.
• Lay carpets and cushions after painting is finished so fabrics don't soak up the fumes.
• Mix paint and clean brushes outdoors, and remove thinner containers from the building every day.
• Book ozone treatment before handover and check TVOC levels before opening the building.

FAQ: Ozone Paint Odor Removal

Do we need to leave the area?

Yes. No people, pets or plants may be inside during the cycle. You can return once the technician confirms the ozone has decomposed and the space has been ventilated.

How long does it take?

It depends on the size of the space and how strong the odor is, but areas are generally ready to use within about 2 hours.

Does ozone leave any residue?

Ozone naturally breaks down into oxygen, so there is no chemical residue. The team waits for it to decompose and ventilates before handing the space back.

What size of space is it suitable for?

Anything from a condo bedroom or meeting room to an ordination hall, merit hall, warehouse or factory. The cycle is calculated from the actual room volume.

Will the smell disappear 100%?

Ozone helps reduce and break down a large share of the vapors, as shown by before-and-after TVOC readings. If materials are still off-gassing, technicians may recommend extra ventilation or a follow-up treatment.

What about Buddha images and murals?

Technicians survey the site first and advise covering or moving sensitive items, such as old artworks, natural rubber or delicate electronics, based on what they find.

Related Services and Resources

• Ozone Cleaning Service
• Disinfection Spraying Service
• Residential Ozone Disinfection
• US EPA: Volatile Organic Compounds' Impact on Indoor Air Quality
• WHO: Air Quality, Energy and Health

Don't Let Paint Fumes Overshadow a Day of Merit

Talk to WHD about ozone paint odor removal for ordination halls, merit halls, offices or freshly renovated homes.

Call 065-556-6294 · LINE @whd268 · Email worldhealthdisinfection@gmail.com
88/268 Kanlapaphruek Rd., Bang Khae, Bangkok 10160, Thailand