Why Is My Bathroom Ceiling Paint Peeling?
Find out what's lifting the paint above your shower and how to repaint the ceiling so it stays put.
The short answer
Bathroom ceiling paint peels when moisture gets behind it. The four causes are standard emulsion used instead of a moisture-resistant bathroom paint, poor ventilation, fresh plaster painted without a mist coat, and rushed cleaning and drying. To fix it, scrape off the loose paint, sand and fill, treat any mould, prime, then repaint with a bathroom or anti-mould paint and improve the ventilation.
Peeling paint on a bathroom ceiling starts with a few small flakes above the shower and spreads steadily if it's left. Bathrooms deal with far more steam and condensation than any other room in the house, and paint that copes fine in a bedroom gives up quickly when warm, wet air settles on it every day.
Getting it sorted early saves a bigger job later. Below we cover the four reasons bathroom ceiling paint peels, how to strip and repaint the affected area properly and the changes that stop it happening again.
Why Bathroom Ceilings Peel More Than Other Rooms
Hot air rises, so the ceiling takes the brunt of the steam from every bath and shower. When that moisture works its way behind the paint, the paint loses its grip on the surface beneath and starts to bubble, crack and lift.
Fixing it means dealing with the moisture as much as the paint. A fresh coat over the problem will look good for a few weeks, but unless the cause is tackled, the flakes come back.
What Causes Bathroom Ceiling Paint To Peel
1. The Wrong Paint Was Used
The most common cause is a standard emulsion meant for living rooms and bedrooms. Ordinary emulsion for walls and ceilings isn't made to cope with daily steam, so it softens and lets go.
A dedicated moisture-resistant bathroom paint is the right choice for the ceiling. Most anti-mould paints have the same moisture-resistant qualities, with the added benefit of stopping black mould from settling in.
2. Poor Ventilation
Without an extractor fan, or with a window that stays shut, damp air has nowhere to go. It settles on the coldest surfaces in the room, which in a bathroom are the ceiling and outside walls, and the paint takes the damage.
3. Fresh Plaster Without A Mist Coat
New plaster is very porous and soaks the water out of paint before it can bond. If a bathroom has been replastered and painted without a mist coat first, the paint will peel whether it's a bathroom paint or not. Our guide to painting new plaster with a mist coat walks through the method.
4. Poor Application
Rushed prep is the last common cause. Painting over a greasy or dusty ceiling, or putting the second coat on before the first has properly dried, leaves a weak bond that cracks and peels once the steam gets to it.
Stripping And Repainting A Peeling Bathroom Ceiling
Work through the ceiling in this order, and don't skip the scraping:
- Scrape off all the loose and flaking paint with a wallpaper or paint scraper, going back until the edges are firmly stuck.
- Sand the rough edges with fine sandpaper or a palm sander so they don't show through the new paint.
- Fill any cracks with a fine wall filler and sand it flush once it's dry.
- Kill any mould with a mould remover and let the ceiling dry fully.
- Check the surface is smooth and level, and apply a finishing skim if the scraping has left it patchy.
- Prime the bare and repaired areas, using a mist coat on any new plaster.
- Cut in around the edges with a brush, then roll the rest of the ceiling with a bathroom or anti-mould paint, leaving the full drying time between coats.
How long this takes depends on the size of the ceiling and how much of it has lifted. Done properly with the right paint, it's a job you won't need to repeat for a long time.
Stopping The Paint Peeling Again
Choose A Moisture-Resistant Paint And Take Your Time
A bathroom paint or an anti-mould paint for damp rooms gives the ceiling the best chance of holding up to steam. The application matters just as much as the tin, so start with a clean, dry ceiling and give each coat the full drying time on the label before the next one goes on.
Get The Steam Out Of The Room
Better ventilation is the other half of the fix. An extractor fan pulls damp air out before it reaches the paint and helps prevent mould at the same time, and our pick of the best bathroom extractor fans covers models for every size of room. Leave the fan running for a while after a shower, and open a window when you can.
If black mould has already appeared alongside the peeling paint, deal with that before you redecorate. Our guide on how to get rid of mould covers the methods we use.
Your Questions Answered
Can you paint over peeling paint on a bathroom ceiling?
No, painting over peeling paint on a bathroom ceiling won't last, because the new coat is only as strong as the loose paint underneath it. Scrape off everything that's lifting, sand the edges smooth, fill and prime the bare patches, then repaint with a moisture-resistant bathroom paint. Skipping the scraping means the new paint will peel along with the old.
Do you need special paint for a bathroom ceiling?
Yes, a bathroom ceiling needs a moisture-resistant bathroom paint or an anti-mould paint rather than a standard emulsion. These paints are made to cope with steam and condensation without softening or peeling, and many include a mould inhibitor. Standard emulsion is fine for bedrooms and living rooms but breaks down quickly in a room with a daily shower.
Why is paint peeling on my newly plastered bathroom ceiling?
Paint peels off a newly plastered ceiling when it goes straight onto the bare plaster without a mist coat. Fresh plaster is so porous that it draws the water out of the paint before it can bond. Strip the peeling paint, apply a mist coat of watered-down emulsion and let it dry, then finish with a bathroom paint.
How do I stop condensation on my bathroom ceiling?
The best way to stop condensation on a bathroom ceiling is to remove the steam at its source with a working extractor fan, left running for a while after each bath or shower. Opening a window, keeping the room warm and wiping down wet surfaces all help too. In a bathroom with no window, a dehumidifier picks up what the fan misses.
Why does bathroom ceiling paint peel above the shower first?
Hot air rises, so the ceiling above the shower takes the brunt of the steam from every bath and shower. When that moisture works its way behind the paint, the paint loses its grip on the surface beneath and starts to bubble, crack and lift. Fixing it means dealing with the moisture as much as the paint.
Is anti-mould paint as good as bathroom paint for a ceiling?
Anti-mould paint is a good choice for a bathroom ceiling, as most anti-mould paints have the same moisture-resistant qualities as a dedicated bathroom paint. They also stop black mould from settling in. Either one gives the ceiling the best chance of holding up to steam, as long as you start with a clean, dry ceiling and leave the full drying time between coats.
Do I need to deal with mould before repainting a peeling ceiling?
Yes, deal with any black mould before you redecorate. Kill it with a mould remover and let the ceiling dry fully before you fill, sand and prime. Mould left in place also undermines the new paint, so treat it first. Our guide on how to get rid of mould covers the methods we use.
Will a fresh coat of paint stop the peeling on its own?
No, a fresh coat over the problem looks good for a few weeks, but the flakes come back unless the cause is tackled. Scrape off the loose paint, fill and sand, treat any mould and prime before repainting with a bathroom or anti-mould paint. Improving the ventilation with an extractor fan is the other half of the fix.
Eddie spent five years as a self-employed painter and decorator before going part time to become one of the main writers at DIY Works. From garden fences to mist coats on fresh plaster, painting and decorating is his speciality.