The Fraser Valley experiences powerful wind events when Pacific storms funnel through mountain passes. Wind speeds can exceed 100 km/h, turning loose shingles into dangerous projectiles.
Understanding Our Wind Patterns
The Coquihalla corridor and Fraser Canyon act as natural funnels, accelerating winds as they move through the valley. Peak wind season runs October through March.
- Southeast to northwest flow patterns
- Cold outflow winds from interior BC
- Sustained 60 km/h with gusts to 100+ km/h
- Most damaging during rapid pressure drops
How Wind Damages Roofs
Wind damage starts at edges. Negative pressure lifts shingles at corners, eaves, and ridges. Once a single shingle lifts, adjacent shingles become vulnerable.
The most vulnerable areas are roof edges, corners, and any location where flashing meets the roof surface.
Prevention Strategies
- Install high-wind rated shingles (130+ km/h rating)
- Use six nails per shingle instead of four
- Metal roofing with concealed fasteners resists uplift
- Keep trees trimmed to reduce branch impact
After a major wind event, we offer free visual inspections for Fraser Valley homeowners.