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In Fredericton, Moncton, Saint John, and across New Brunswick, freeze–thaw cycles are a leading cause of asphalt shingle roof damage. These constant temperature swings above and below 0°C quietly weaken your roof and can shorten its lifespan by years.
What Happens During Freeze–Thaw?
When snow melts and refreezes repeatedly:
- Water seeps into small cracks in shingles
- Freezing causes expansion inside the material
- This leads to cracking, weakening, and long-term deterioration
Main Types of Roof Damage
- Cracking and Brittleness
Cold weather and moisture cycles make shingles:
- Brittle and prone to cracking
- More likely to break under wind or snow
- Granule Loss & Faster Aging
Freeze–thaw loosens protective granules, causing:
- Increased UV damage
- Faster roof aging
- Reduced protection against weather
- Ice Dams & Leaks
Ice buildup along roof edges can:
- Trap water under shingles
- Cause interior leaks and costly repairs
Why It’s Worse in New Brunswick
Local conditions make the problem more severe:
- Frequent freeze–thaw cycles
- Heavy snow and wind exposure
- High moisture levels
This makes roof maintenance and protection essential for homeowners in NB.
How to Protect Your Roof
- Schedule regular roof inspections
- Ensure proper attic ventilation and insulation
- Apply protective roof treatments to reduce water penetration and maintain flexibility
Roof Replacement vs. Roof Protection
Not every damaged roof needs replacement. Many roofs can be restored and protected, extending their life and saving thousands in costs.
A professional roofing contractor can assess whether you need:
- Repair
- Protective coating
- Or full roof replacement
Final Takeaway
Freeze–thaw damage is one of the biggest threats to asphalt shingle roofs in New Brunswick. Early action with proper roofing services, maintenance, and protection can significantly extend your roof’s lifespan and protect your investment.
Looking for expert roofing services in Fredericton, Moncton, Saint John or nearby?
Book a professional roof evaluation today and prevent costly damage before it starts.