Paint Peeling Off The Wall
- How urgent
- Low risk
- Who fixes it
- A painter and decorator
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Peeling (the trade calls it flaking) is adhesion failure: the paint film has stopped gripping whatever is beneath it and comes away in sheets or curling flakes. Dulux lists moisture beneath the paint film, a powdery or friable surface, and dirt, oil or grease as the usual causes, and Dulux Trade adds that hungry, porous surfaces such as bare plaster need a very thin first coat or a primer sealer before normal coats. The tell is on the back of the flake. Bare plaster on the back, with the wall behind looking dusty or pale, means the first coat never soaked in; this is the classic peeling like skin after painting new plaster. Another colour on the back means the failure is between coats and an earlier layer is the weak one, often old distemper, silk or gloss. A wet or salty wall behind means damp. Peeling spreads, because every loose edge lets moisture and air behind the film.
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What usually causes it?
- Emulsion painted straight onto new or bare plaster with no thinned mist coat or primer sealer
- A powdery, chalky old distemper or limewash layer that the new paint is stuck to instead of the wall
- Painting over gloss, eggshell or silk that was never keyed with abrasive
- Dust, sanding debris or cooking grease left on the wall before painting
- Moisture reaching the back of the film from a leak, condensation or plaster that had not dried
- Painting in cold or damp conditions, below the minimum temperature on the tin
- Decades of coats built up so the film is too thick and rigid to hold on
Is it dangerous?
Peeling paint is not dangerous in itself, but old layers underneath can be. HSE says lead was widely used in paint for homes until the 1960s and was not removed from all commonly used paint until the early 1980s, so it can sit under newer decoration in older houses. Do not dry-sand, burn or heat-gun old layers you cannot date: that releases lead dust or fumes. Textured ceiling and wall coatings applied before 2000 can contain asbestos and must not be scraped, sanded or drilled.
Can I fix it myself?
Small patches are a reasonable DIY job. 1. Scrape back to a firm edge where the paint no longer lifts when you push a scraper under it. 2. Feather the edge with wet abrasive paper rather than dry sanding. 3. Look at the back of a flake to find the cause. Bare plaster: prime with a thinned coat of emulsion or a primer sealer. Chalky surface: wash it off until the wall stops dusting, then seal. Shiny surface: key it with abrasive and use a suitable primer. Damp: find and fix the source and let the wall dry first. 4. Wash with sugar soap, rinse and let it dry fully. 5. Repaint. Do not paint over loose edges; the new coat will lift with them. Stop and get a decorator if the failure is over a wide area, the wall is damp or powdery, or the paint may be old enough to contain lead.
When should you call a painter and decorator?
Call a painter and decorator when the peeling covers more than a patch you can reach from the floor, when the surface beneath is chalky or unstable, when you have stripped it once and it has come back, or when you suspect lead paint or a pre-2000 textured coating. A decorator identifies which layer failed and chooses the primer that will hold, which is the step that usually goes wrong. If the wall behind is wet, the moisture needs sorting before any decorator can make paint stick.
What will the painter and decorator actually do?
- Test the adhesion of the existing coats and identify which layer is releasing
- Strip back to a sound edge using wet methods where lead is possible, and flag textured coatings that need specialist removal
- Wash down, remove chalky residue, fill and sand flat where the strip has left a step
- Apply the right primer or sealer for the surface: bare plaster, chalky distemper and old gloss each need a different one
- Recoat within the temperature and recoat times on the manufacturer's data sheet
What to send for a repair and decorating quote
Send one room photo and a close-up taken safely from floor level. Describe when the peeling paint appeared, earlier painting and repair history, any reported leak and whether the mark changes after rain or use of the room. Do not disturb unknown old or textured coatings for a quotation photo.
Ask for the cause assessment, underlying repair, preparation and finish to be separate in the quote. Specify the rooms and surfaces, local repair versus repainting a whole surface, materials, protection, waste removal and access. Confirm whether drying or another trade means a return visit before decoration.
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