How do I fix peeling paint?

Peeling paint needs to be completely removed and the surface properly prepared before repainting, or the problem will return within months. The key is identifying why the paint is peeling in the first place and addressing that root cause.

Surface preparation is everything when dealing with peeling paint. Start by scraping off all loose and flaking paint using a putty knife or paint scraper. Don't just paint over the edges of peeling areas - this creates a visible line and the new paint won't adhere properly. After scraping, sand the entire surface with 120-grit sandpaper to create a smooth transition between the bare areas and remaining paint. This also gives the new paint something to grip onto.

Moisture is the most common culprit behind peeling paint in Ottawa homes. Our freeze-thaw cycles are particularly harsh on exterior surfaces, and interior humidity from cooking, showering, and daily living can cause paint to lose adhesion. Check for water damage, leaks, or poor ventilation before repainting. In bathrooms and kitchens, ensure your exhaust fans are working properly and consider running them longer after use.

For exterior peeling paint in Ottawa's climate, timing matters. Plan this work for late spring through early fall when temperatures are consistently above 10°C and humidity is lower. If you're dealing with multiple layers of old paint on a heritage home (common in areas like the Glebe or New Edinburgh), you may need to strip down to bare wood, which can be time-intensive.

When to call a professional: If the peeling covers large areas, involves multiple coats of paint, or you suspect lead paint (homes built before 1978), hire a painting contractor. Lead paint requires special handling and disposal procedures. Also, if the peeling is caused by structural moisture issues, you'll need to address the underlying problem first - this might involve a contractor for roof repairs, foundation work, or ventilation improvements.

Your next steps: Test a small area first by scraping, sanding, priming, and painting to ensure good adhesion. Use a high-quality primer designed for your surface type - this is not the place to save money. For exterior work in Ottawa, choose paint rated for our temperature extremes and UV exposure.