Winter Damage to Exterior Paint in Toronto: Ice Dams, Road Salt and What to Fix in Spring

Photo: Anurag Jamwal / Pexels

A Toronto winter leaves its mark. By March, many homes have peeling paint along the bottom of the garage door, flaking porch steps, stained fascia under the eaves and trim that looks a lot worse than it did in November. Snow, ice dams, road salt and months of freeze-thaw cycles all work against exterior paint. The key is to spot the damage early, fix the causes and plan repairs so they're ready to go once the weather warms. Here's what we look for on Toronto homes after winter and how we approach spring repairs.

Key takeaways

• Ice dams, road salt, snow piled against walls and freeze-thaw cycles are the main causes of winter paint damage in Toronto.
• Damage tends to concentrate low on the house, near the driveway and sidewalk, and high at the eaves.
• Fix the cause, such as poor drainage or ice dams, before repainting, or the damage will come back next winter.
• Salt residue needs to be washed off before any painting, and spring repairs should wait for dry wood and the right temperatures.

The four big causes of winter paint damage

1. Freeze-thaw cycles

Toronto winters rarely stay frozen. Temperatures swing above and below zero again and again, and every swing lets water seep into cracks and then freeze and expand. Over a season, that cycle pries paint loose from wood, opens up caulk joints and breaks down porous surfaces.

2. Ice dams

When heat escapes into the attic, snow on the roof melts, runs down and refreezes at the colder eaves. The ridge of ice can push meltwater under shingles and behind fascia, soffits and siding. Signs include long icicles, staining on the siding below the eaves and peeling paint on the fascia and the top of the wall.

3. Road salt and de-icers

Salt on the street, driveway and front walk gets splashed and tracked onto the lower parts of your home. It can dull and stain paint, leave white residue on brick and masonry, and speed up corrosion on metal railings and fasteners. Garage doors, porch steps, the bottom of door frames and lower siding near the driveway often show it first.

4. Snow piled against the house

Snow shovelled or plowed against walls, porch columns and lower trim keeps those surfaces wet for weeks. The paint on the bottom few boards and the base of columns often fails long before the rest.

Where to look after winter

• The eaves: fascia boards, soffits and the top courses of siding.
• Garage doors: especially the bottom panels and edges.
• Porches and steps: treads, risers, railings, spindles and the bottoms of columns.
• Door frames and thresholds: the lower corners where water and salt collect.
• Window sills: cracked or peeling paint and soft wood.
• Lower siding and trim: anywhere snow sat for long periods.
• Painted brick and masonry: flaking paint or white, powdery deposits.

Take photos so you have a record and a list ready when it's time to get quotes.

Fix the cause before the paint

Repainting a peeling fascia without solving the ice dam above it means you'll be doing it again next spring. Before we paint, we look for the cause:

• Ice dams usually trace back to attic heat loss or ventilation. A roofer or insulation contractor can assess the attic.
• Gutters and downspouts that overflow or drain toward the house should be cleaned, repaired or redirected.
• Snow storage: where possible, pile snow away from the house next winter, and keep a gap between snowbanks and siding or porch parts.
• Rotted wood needs to be replaced. Filler and paint over soft wood won't last through another winter.

Spring repair and repaint, step by step

1. Wash. Salt, grime and mildew need to come off. Painting over salt residue can lead to poor adhesion and blistering.
2. Let it dry. Wood that spent the winter wet needs time to dry out before it's primed.
3. Repair. Replace damaged boards, sills and porch parts.
4. Scrape and sand loose and failing paint back to a sound edge. Many older Toronto homes have old paint that may contain lead, so we test and follow safe practices.
5. Treat metal. Remove loose rust from railings and fasteners and prime with a rust-inhibiting primer.
6. Prime bare wood and repairs, then caulk the appropriate joints.
7. Paint within the label's temperature range, with a dry forecast for drying time.

Products for high-wear winter areas

Some parts of the house simply take more abuse, so we match the product to the job. Porch and floor enamels are made for foot traffic and standing water on steps and porch floors. Durable exterior trim paints in satin or semi-gloss shed water and are easy to rinse. On garage doors, we choose products suited to the material, whether that's wood, steel or fibreglass. On painted brick, we use breathable masonry products so moisture can escape rather than pushing the paint off.

When to schedule the work

Spring in Toronto can be cool and wet well into May, and every exterior product has a minimum temperature for application and drying. We usually start exterior repairs once the wood has dried out and overnight lows are reliably within the label's range. Because spring is when everyone notices winter damage, schedules fill up fast. Booking a quote in late winter gives you the most choice of dates.

Frequently asked questions

Why is the paint peeling only on the bottom of my garage door?

That's where salt, slush and snow sit all winter. The bottom panels and edges stay wet longest, so they usually need extra prep and a durable product.

Can road salt damage painted brick?

Salt and moisture can cause white deposits and flaking on painted masonry. Washing, letting the brick dry and using breathable masonry products all help.

Should I touch up in winter or wait?

Most exterior touch-ups need to wait until it's warm enough. In the meantime, keep gutters clear and snow away from the house to limit further damage.

Get your free painting quote

If winter left your trim peeling, your steps flaking or your fascia stained, we can help you fix the cause and plan a spring repaint that lasts. Get your free painting quote from 1-800 PRO PAINTER.