Peeling Paint Isn't Just Cosmetic — It's Telling You Something
Paint peels for a reason. Before you reach for a brush, it's worth understanding what caused the problem — because painting over the cause without fixing it means you'll be back here in six months.
Why Paint Peels
- Moisture: The most common cause. Steam from bathrooms, condensation in kitchens, or a leak somewhere in the building structure saturates the plaster and lifts the paint.
- Poor preparation: Painting over dirty, greasy, or glossy surfaces without proper priming causes adhesion failure.
- Low-quality paint: Cheap emulsions have less binding agent and are more prone to peeling under normal conditions.
- Incompatible layers: Applying water-based paint over old oil-based paint (without the right primer) causes peeling at the interface.
Step 1: Fix the Root Cause First
If the peeling is in a bathroom or kitchen, improve ventilation. Make sure extractor fans are working and being used during and after cooking or showering. If there's a leak above a ceiling, fix that before touching the paint — repainting a wet ceiling is wasted effort.
Step 2: Remove All the Loose Paint
Use a paint scraper to remove all the flaking and peeling material. Don't stop when you reach stable paint — test the surrounding area by scraping gently. Any paint that loosens easily needs to come off now, not later. Wear a dust mask, especially in older homes where paint may contain lead (pre-1970s).
Step 3: Sand the Edges
Where you've removed paint, there will be a hard edge between the bare surface and the remaining paint. Sand this edge smooth with medium-grit sandpaper so it feathers flat — otherwise you'll see a raised ridge even after repainting.
Step 4: Fill Any Damaged Plaster
If the plaster underneath has been damaged or has small cracks, fill them with ready-mixed filler, let dry, then sand smooth. Clean off all dust with a damp cloth.
Step 5: Prime the Bare Areas
Apply a coat of PVA bonding primer or a dedicated wall primer to any bare plaster or filled areas. This is the step most people skip — and why their repaint peels again. Primer seals the surface and gives the topcoat something to grip. Let it dry completely.
Step 6: Paint in the Right Conditions
Apply your first topcoat, allow to dry for the time stated on the tin, then apply a second coat. For bathrooms, always use a specialist bathroom paint with moisture resistance. For ceilings, use a dedicated ceiling paint (it's thicker and less likely to drip).
Making It Last
The best paint job is the one that's properly prepared. Take the time on the scraping, sanding, and priming — that's where the work is. The painting itself is the easy part.