How to Remove Mould from Walls and Ceilings in Singapore Homes

Last updated: 10 October 2026 · By the Sureclean cleaning team

Short answer: To remove mould from walls in a Singapore home, open the windows, put on gloves and a mask, and wipe the patch with white vinegar or a diluted bleach solution (never mix the two). Leave it for 10 to 15 minutes, scrub gently, wipe with clean water and dry the wall completely. Mould returns unless you also cut humidity and fix leaks. If it covers several rooms or has soaked into the paint, a deep clean or repair is needed.

Why does mould keep growing on walls in Singapore homes?

Singapore is humid all year, and mould needs only three things: moisture, a surface to feed on and still air. Painted walls, grout, silicone sealant and the backs of wardrobes give it all three. That is why mould shows up in the same places in most homes:

• Bathroom ceilings, where steam from hot showers settles and dries slowly.
• Bedroom walls behind wardrobes and beds, where furniture blocks airflow against the wall.
• Corners near windows, where rain gets in or condensation collects.
• Kitchen and service yard walls, especially near the washing machine and laundry drying areas.
• Rooms left closed for weeks, such as a spare room or a unit sitting empty between tenants.

New BTO flats and freshly renovated homes can get it too, because new plaster and paint hold moisture for a while. If mould has spread through several rooms or onto furniture and fabrics, a room-by-room professional spring cleaning deals with it all in one visit. For a small patch, the DIY steps below are usually enough.

Is it mould, mildew or water damage?

Work out what you are looking at before you start scrubbing, because the fix is different for each.

• Surface mildew is a flat grey or light green film, usually in bathrooms. It wipes off easily and is the easiest to deal with.
• Mould appears as black, dark green or brown spots, often fuzzy or in clusters, with a musty smell. It may stain the paint even after you remove it.
• Water damage shows as a yellow or brown ring, bubbling paint, or a damp patch that grows after rain or when the upstairs neighbour uses their bathroom. Mould often grows on top of it.

A quick test: dab the spot with a drop of diluted bleach. If it lightens within a minute or two, it is probably mould or mildew. If it does not change, it may be dirt or a stain in the paint.

If the patch is wet to the touch or keeps spreading from the same spot, treat it as a leak first. Cleaning mould off a wall that is still taking in water will only buy you a few weeks.

How do you remove mould from walls step by step?

This method works on painted walls and ceilings, tiles and grout in HDB flats, condos and landed homes. Test any product on a hidden spot first, as some paints discolour.

• 1. Ventilate. Open the windows, switch on a fan and keep children and pets out of the room.
• 2. Protect yourself. Wear rubber gloves, a face mask and eye protection, especially when working overhead on ceilings.
• 3. Cover the floor and furniture with old towels or plastic sheets so spores and drips do not spread.
• 4. Choose one cleaner. Use undiluted white vinegar for painted walls, or one part household bleach to about ten parts water for tiles and grout. Never mix bleach with vinegar or ammonia, as this releases toxic fumes.
• 5. Apply and wait. Spray or sponge it on and leave it for 10 to 15 minutes.
• 6. Scrub gently with a soft brush or sponge. Hard scrubbing strips matt paint.
• 7. Rinse and dry. Wipe with clean water, then dry completely with a cloth and a fan.
• 8. Bag and bin the sponges and cloths you used.

How do you deal with mould on bathroom ceilings in HDB flats and condos?

Bathroom ceilings are the most common problem area in Singapore homes, and they are awkward to clean safely.

Work from a stable step ladder, not a stool on a wet floor. A sponge mop or a sponge clipped to an extendable pole lets you reach without stretching. Use vinegar rather than bleach overhead where you can, as bleach drips sting eyes and mark clothes.

Look closely at where the mould sits:

• Spread evenly across the ceiling: this is usually steam with too little ventilation. Clean it, then run the exhaust fan or keep the window open during and after every shower.
• Concentrated in one patch, with stains or flaking paint: this can be water seeping through from the flat above. In HDB blocks, speak to the upstairs owner and check HDB’s guidance on inter-floor leaks before repainting.
• Around false ceilings or access panels: in condos there may be pipework or trapped moisture above. Raise it with your MCST if it affects common pipes.

Clean the grout and silicone at the same time. Mould in sealant that has turned black usually needs the sealant replaced.

When has mould damaged the paint or plaster?

Cleaning removes mould from the surface. It cannot fix a wall the mould has already got into. Signs that you need repair work rather than more cleaning:

• Dark stains that come back within days of cleaning, in the same shape.
• Paint that bubbles, blisters, peels or comes away on your sponge.
• Plaster that feels soft, crumbles or sounds hollow when tapped.
• A musty smell that stays even after the wall looks clean.

In these cases the usual fix is to let the wall dry out fully, scrape off loose paint, treat the surface, prime it and repaint with an anti-fungal paint. Sureclean does not do painting, so this is a job for a painter or contractor.

Do not paint straight over mould. It grows back through the new paint, often within a few months, and you will have paid twice.

Rented flats are a separate matter: tell your landlord or agent in writing before you clean or repaint, so it is clear whether the cause is wear, a leak, or how the unit has been used.

How do you stop mould coming back?

In Singapore’s climate you cannot remove every mould spore from a home. What you can do is make your walls a poor place for it to grow.

• Move air every day. Open windows when weather allows, run the bathroom exhaust fan for 15 to 20 minutes after showers, and leave internal doors open.
• Leave gaps behind furniture. Keep wardrobes, beds and bookshelves a few centimetres from external walls.
• Use a dehumidifier in rooms that stay closed, such as storerooms, spare bedrooms and walk-in wardrobes.
• Dry laundry properly. Damp clothes drying indoors put a lot of moisture into a room.
• Fix leaks quickly. Window seals, cracked grout and dripping pipes keep walls damp.
• Clean the hidden places where spores build up: washing machine seals and drums, curtain folds near windows and mattress undersides.
• Wipe down monthly. A quick vinegar wipe on known problem spots stops small patches spreading.

If mould keeps coming back in the same spot despite all this, there is likely a moisture source inside the wall that needs a contractor.

How much does mould cleaning cost in Singapore?

For a small patch, DIY costs very little: white vinegar, household bleach, gloves, a mask and a sponge from any supermarket. Your main cost is time.

When mould has spread through the home, the cost depends on what needs cleaning. At Sureclean, mould on walls, ceilings, tiles and grout is handled as part of a whole-home deep clean:

• Spring cleaning / deep cleaning: from $600*, with most jobs $700–$800*.
• Disinfection: from $265*, typically $370–$475* per session.
• Move-in / move-out cleaning: from $370*, with most jobs $475–$525*, useful when handing back a rented unit.

Mould often spreads to soft furnishings and appliances, which are priced separately (see the table below). First-time customers get a 10% discount. Prices are before GST.

Repainting or repairing damaged plaster is not included, as we do not do painting. Ask a painter or contractor for that quote separately.

When should you call a professional for mould?

DIY is fine for a patch you can reach and wipe clean. Consider calling in a cleaning team when:

• Mould is on walls or ceilings in several rooms, not one corner.
• It has spread to curtains, mattresses, sofas or the washing machine.
• Someone at home has asthma or allergies and should not be around spores while you clean.
• You are moving in or out and need the unit handed over clean.
• The ceilings are too high or awkward to reach safely.

Sureclean’s professional spring cleaning covers walls, ceilings, tiles, grout, cabinets and fixtures room by room. Our own trained crews bring their own equipment. We are NEA-licensed, carry S$1,000,000 public liability insurance and have a 4.9-star Google rating across 1,500+ reviews.

We will also tell you straight when the problem is a leak or damaged plaster, so you know when cleaning will not be enough. For related work, see disinfection services, washing machine cleaning, curtain cleaning and our full cleaning prices.

What do mould-related cleaning services cost at Sureclean?

Published starting prices before GST. Mould on walls and ceilings is handled within a spring or deep clean. Soft furnishings and appliances where mould spreads are priced separately.

Frequently asked questions

Is vinegar or bleach better for removing mould from walls?

White vinegar suits most painted walls because it is gentler on paint and safe overhead. Diluted bleach (about one part to ten parts water) works faster on tiles and grout. Never mix them. If mould has spread beyond what you can treat yourself, a Sureclean spring cleaning starts from $600*, with most jobs $700–$800*.

Why does mould keep coming back on my bathroom ceiling?

It usually returns because steam settles on the ceiling and dries too slowly. Run the exhaust fan or open the window during and after showers. A patch that keeps coming back in one spot may be a leak from the flat above. For whole-home mould and grime, our spring cleaning is from $600* before GST.

How much does professional mould cleaning cost in Singapore?

At Sureclean, mould on walls, ceilings and grout is cleaned as part of a spring or deep clean, from $600* with most jobs $700–$800*. Disinfection is from $265*, typically $370–$475* per session. Repainting is not included. First-time customers get a 10% discount, and all prices are before GST.

Can I just paint over mould on my wall?

No. Paint seals mould in, and it grows back through the new coat, often within months. Clean the wall, let it dry completely, scrape off loose paint, then prime and repaint with anti-fungal paint. Sureclean does not paint, but our spring cleaning (from $600*) can prepare the rest of the home.

Does mould on walls mean my washing machine and curtains need cleaning too?

Often, yes. Spores settle in damp places like washing machine seals and curtain folds near windows. If clothes smell musty after washing, clean the machine: top-load is $188* standard or $238* deep, front-load $288* or $338*. On-site curtain steam cleaning is $35* per panel.

Related guides

• Spring Cleaning Singapore
• Cleaning prices in Singapore
• Professional spring cleaning

Main service page: Spring Cleaning Singapore — from $600*

*All prices shown are “from” prices for guidance only and are subject to change without notice. Final pricing depends on unit size, condition and site access — we confirm an exact written quote on WhatsApp (+65 6983 9523) before any booking is confirmed.

Alvin Tan

Founder & Managing Director, Sureclean

Alvin founded Sureclean in 2013 to bring reliable, professional cleaning standards to homes and businesses across Singapore. Today, Sureclean is NEA Class 3-licensed (NEA240120/6509C/C3/N01), rated 4.9★ across 1,553+ Google reviews, and has served over 50,000 homes across Singapore — backed by S$1,000,000 in public liability insurance and a 400-hour training standard for every crew member.