You turn the key, push the door open, and the flat introduces itself by smell before you’ve taken a single step inside. Sharp, faintly sweet, somewhere between a stationery shop and a furniture showroom. It’s the new carpentry, the fresh paint, and the mattress still sealed in its plastic, all of it quietly breathing into a shut room that has been sitting in the heat since the contractor handed back your keys.
Most of it is harmless in small doses, and most of it leaves on its own. Still, it helps to know what you’re smelling, how long it tends to linger, and which parts of it a proper clean can lift. That’s how you arrive at a move-in date that feels right, rather than one that simply fits the calendar. And if you’re bringing home a newborn, an elderly parent, or anyone who keeps an inhaler in the drawer, that peace of mind is worth the wait.
Where the Smell Comes From
Very little of it is the paint. Engineered wood, plywood and particle board are held together with resins, and laminates, adhesives, sealants, new foam and new textiles all release compounds into the air as they cure and settle. Formaldehyde is the best known of them.
The National Environment Agency has restricted formaldehyde in interior paints sold in Singapore from 1 January 2026, requiring content below 0.01 per cent weight by weight. NEA notes that formaldehyde can be emitted into the air and accumulate in indoor spaces, that short-term exposure can irritate the eyes, nose, skin and throat, and that longer-term exposure carries greater risk. New furniture and built-in carpentry sit outside that paint rule, so in a recently renovated flat they’re the likelier source.
How Long It Typically Lingers
Emissions are strongest in the first few weeks, then taper off over months. Heat and humidity speed the process along, which cuts both ways here: a warm flat releases these compounds faster, while a flat locked up tight for a week concentrates whatever has come out.
Nobody can give you an exact timeline. It depends on how much new carpentry went in and what it was made from.
What you can expect is a smell that gets noticeably weaker each week. If week six smells as strong as week one, that calls for a closer look.
What Cleaning Can and Cannot Do
A post-renovation clean removes the fine construction dust coating every surface, and that dust carries residues from sanding, sawing and painting. Wiping it away improves the air in the flat, particularly inside cabinets and drawers, where it settles unseen and gets stirred up every time a door opens.
What no clean can do is stop a board off-gassing from the inside. That’s a separate job, and where our formaldehyde removal treatment comes in, applied to the surfaces and carpentry themselves. How much difference it makes depends on the materials in your flat, so we’ll look at it with you first.
Ventilation Does Most of the Work
The most effective step also happens to be free. NEA’s guidance on indoor air quality states plainly that occupants of residential homes may improve home ventilation by opening doors and windows, and that fans can be used to promote air circulation when needed.
A few ways to get more out of it:
- Open windows on opposite sides of the flat so you get a through-draught, not one still room
- Point a standing fan out of a window so it pushes indoor air out
- Open every cabinet door and pull out every drawer, since enclosed carpentry holds the most
- Unwrap new mattresses and sofas early and let them air in a ventilated room
- Run all of this for a few hours a day in the weeks before you move in
Two things to watch out for here: watch the weather so an afternoon downpour doesn’t blow through your new flooring, and shut things up during a hazy spell, when the air coming in brings its own problems.
Questions to Put to Your Contractor
A short conversation at handover saves a lot of guesswork later. Ask which boards went into the built-in carpentry, and ask about any low-emission rating they carry, since the same wardrobe can be built from materials that behave quite differently.
Ask what was used to seal the exposed edges. Ask when the last coat of paint went on, too, because the clock on all of this starts at the final application and not at the handover date.
Keep the answers somewhere you can find them. If the smell turns out to be stubborn, knowing what’s in your flat makes it far easier for anyone assessing it to tell you what’s going on.
Sensible Steps Before Moving In With Young Children
Households with infants, elderly members or anyone prone to asthma understandably want more certainty. Airing the flat out over several weeks before move-in gives you the biggest margin, so start earlier than the weekend before. Dust left behind by the renovation is the other half of the problem, which is why post-renovation cleaning is essential before the furniture arrives. Bedrooms deserve extra thought as well, since they tend to have the most built-in carpentry per square metre and the door stays shut all night.
Wash new curtains, bedding and cushion covers before anyone uses them, keep bedroom windows open where security allows, and hold off on buying more new furniture until the flat has settled. If someone in the household develops persistent irritation of the eyes, nose or throat that eases once they leave the flat, raise it with a doctor.
What About Air Purifiers and DIY Remedies
A purifier with a particle filter is excellent for dust and haze, though the standard filter in most home units does very little for gases. Models with an activated carbon stage can absorb some of them. Treat that as a helpful extra while the flat airs out.
As for the popular home remedies, bowls of vinegar, charcoal briquettes, cut onions and houseplants, none of them shift meaningful volumes of air in a whole flat. Charcoal and plants do no harm and may help a little inside a small enclosed cupboard, so treat them as a nice extra and don’t bring your move-in date forward because of them.
Settling Into a Home That Smells Like Nothing at All
What you want is a flat that doesn’t smell of anything in particular. Getting there is mostly a matter of time and airflow, helped along by a thorough clean once the contractors have finished and before the furniture arrives.
Give it time, keep the windows working for you, and watch how the smell changes week by week. If the air in your new place still feels sharp after a few weeks of airing out, get in touch and we can take a proper look before you settle in.
