Wall paint peeling, bubbling or cracking: the usual causes
Paint stays on a wall only while it grips a clean, dry surface. Peeling and bubbling usually mean that grip has failed, either because moisture is getting behind the paint film or because the surface was poorly prepared. Water pushes the film away from the plaster, so you tend to see blisters first and loose flakes later. Paint bubbling on a wall is often this early stage: the film has lifted but not yet split.
Poor preparation gives a similar result without any water. If the wall was not cleaned before painting, or new paint went over loose paint without a primer, the new coat has little to hold on to and can lift in sheets. Flaking in bathrooms and kitchens often follows damp.
Cracks have a different cause. HDB's home care guide on walls explains that cracks along the joints between a block wall and reinforced concrete elements come from differential expansion and contraction: the two materials expand and contract by different amounts as temperatures change.
If you are not sure what kind of crack you have, our guide to wall cracks goes into more detail.
Check for water before you repaint
Fresh paint on a damp wall only covers the problem for a while. A damp patch that keeps coming back after repainting needs the water source traced first. If the damp is on a wall, start with our guide to water seepage in a wall. If a pipe or fitting is dripping, see leak repair.
If the damp is on the ceiling, look upstairs. HDB's guide to ceiling leaks says leaks from the flat above seep through the floor slab when the waterproof membrane and screed wear over time. These leaks are common in older buildings, especially in toilets and bathrooms, and untreated leaks may damage electrical items and cause mould growth.
HDB also says flat owners maintain their own flats, including the floor and ceiling slabs, so you and your neighbour arrange the repair and split the costs. Leaks from common property such as the roof are for the Town Council, according to HDB's ceiling leaks page. Our guide to a ceiling leak from upstairs explains what to do next.
How to repair peeling paint
Once any leak is fixed, read the safety note, then work through these steps in order.
- Stop any water. Fix the leak or seepage first and give the wall time to dry out.
- Scrape off loose paint. Remove every flake and bubble with a scraper until the paint left on the wall holds firm.
- Clean and dry the wall. Wipe away dust and loose bits, then let the surface dry fully.
- Fill and seal cracks. Fill gaps and seal cracks so the new paint has a smooth, sound base.
- Prime and repaint. Prime the bare patches, then repaint the wall so the finish is even.
If you see wall paint cracking in fine lines, HDB's walls guide suggests re-painting the wall with a flexible sealant or elastomeric paint for hairline cracks, and engaging a contractor for wider cracks.
If there are spots of mould on the wall, deal with them before you repaint. Our guide to painting over mould explains what to do first.
When it is not just paint
Sometimes flaking paint on a ceiling is a sign that the concrete underneath is failing. HDB's guide to spalling concrete says spalling is common in older buildings, especially in damp areas such as kitchens and toilets. It is largely caused by carbonation, which corrodes the steel bars in the ceiling slab so the concrete cover cracks and bulges.
HDB says the home owner is responsible for preventing spalling through regular maintenance, and for repairs. If the patch is large, HDB advises engaging a contractor promptly before more concrete dislodges. Its spalling concrete page also suggests painting ceilings regularly, sealing cracks and unused drilled holes, and opening windows, vents or doors to reduce humidity in kitchens, toilets and bathrooms.
Our guide to spalling concrete has more detail.
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FROM THE HOMEZYPRO DIRECTORY
Published home painting rates
For the most common unit (per job), the lowest published home painting rates from 6 companies run from S$50 to S$250 per job (middle rate S$150), for anything from one wall to a whole flat, so check what each price covers. The middle figure is a real published rate, not an average. Each figure is one company's own advertised rate with its conditions, not a quote.
See 8 published home painting rates and sources
| Company | Service as listed | Rate | Source |
|---|---|---|---|
| Herofix.sg | Major Paint Peeling + Putty | S$50 to S$300 per job | herofix.sg |
| Handy Expert SG | HDB & condo painting - First Hour | S$60 to S$80 per hour | handyexpertsg.com |
| My Handyman SG | Professional Painting & Wall Touch-Ups | From S$120 per job | myhandymansg.com |
| Arshinogor Pte Ltd | Nippon Paint - Standard Emulsion | S$150 per job | arshinogor.com |
| Repairhome.sg | Painting (room, HDB, condo, move-in or handover) | From S$150 per job | repairhome.sg |
| Home Fix SG | Painting Services | S$200 per job | homefixsg.com |
| Handyman AZ | One-room painting | From S$250 per job | handymanaz.sg |
| Tuba Engineering & Renovation Pte Ltd | Painting package, 2-room | S$500 to S$900 per package | tuba-eng.net |
In the directory, 8 companies publish a home painting line, and 6 of them price it per job. Their lowest published rates run from S$50 to S$250 per job, with S$150 in the middle, a real published rate as printed. The scope as printed covers anything from one wall to a whole flat, so check what each price includes. One per-job line for major paint peeling with putty is printed at S$50 to S$300 per job. Of the other two lines, one for the first hour is printed at S$60 to S$80 per hour, and a 2-room package at S$500 to S$900 per package.
For prevention, HDB's walls guide suggests allowing cross-ventilation in the flat and re-painting walls regularly. To plan the job, see our page on painting, compare handyman rates or browse handyman companies.
Questions
Can I paint over peeling paint?
Not until the loose paint is scraped off and the wall is dry. New paint over flaking paint has nothing firm to grip, so it tends to lift with the old layer. Scrape back to firm paint, clean the wall, fill any cracks and prime the bare patches, then repaint.
Why does paint bubble in the bathroom?
Paint in a bathroom usually bubbles because moisture is getting behind the paint film. Bathrooms stay damp, and a leak from the flat above or seepage through a wall adds more water. Let the room air out, check for leaks, and repaint only after the wall has dried fully and the loose paint is scraped off.
Is peeling paint a sign of a leak?
Sometimes, yes. Peeling or bubbling paint can mean water is coming in from a leak or seepage, but it can also come from a damp room or a wall that was not cleaned and primed. A patch that keeps coming back after repainting is a strong sign that you need to trace the water source first.
What does HDB suggest for hairline wall cracks?
HDB suggests re-painting the wall with a flexible sealant or elastomeric paint. For wider cracks, its walls guide advises engaging a contractor. HDB also explains that cracks along the joints between a block wall and reinforced concrete elements come from the materials expanding and contracting as temperatures change.
Who pays when a neighbour's leak spoils my paint?
You and your neighbour arrange the repair and split the costs, according to HDB, because flat owners maintain their own flats, including the floor and ceiling slabs. HDB's ceiling leaks guide adds that leaks from common property such as the roof are for the Town Council. Repaint only after the leak is fixed and the ceiling is dry.
Can a handyman fix peeling paint?
Often, yes, for scraping, sealing small cracks and repainting. A leak or spalling concrete needs its own repair first. In the directory, 6 companies price painting per job; their lowest published rates run from S$50 to S$250 per job, so ask what each price covers before you book.
Prices come only from the sourced company rates in the HomezyPro directory, shown with each company and its source.
Practical guidance for planning a home job in Singapore. Company prices come from the HomezyPro directory, each linked to its source; rules and safety points link to the agency or manufacturer that sets them. This is not a site inspection, a quote or professional advice for your home.
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