During British Columbia’s freeze-thaw cycles, ice damming occurs when snow on the roof melts and then refreezes at the colder eaves. This process creates a barrier of ice that forces water back up and under your shingles, leading to significant leaks.
The damage is often compounded by the repeating nature of these cycles:
- Widening Cracks: Water that seeps into small gaps in the roofing materials freezes at night and expands. This physical expansion widens existing cracks in the shingles.
- Compromised Seals: The constant expansion and contraction during these temperature swings compromise the shingle seals over time, allowing moisture to penetrate the roof structure.
- Eave Vulnerability: Because the eaves are typically colder than the rest of the roof, they are the primary site for ice buildup, which puts extra stress on the lower sections of your roofing system.
We recommend regular attic ventilation checks and proper underlayment to mitigate these risks. If you suspect your roof has been affected by recent temperature swings, you can claim your complimentary roof inspection to ensure your home remains protected. Please note that warranties vary by manufacturer and installation, and insurance coverage for roof damage depends on your specific homeowner’s policy and the cause of damage.
Related FAQs
-
Do You Need an Air Gap under a Metal Roof?
Read More »: Do You Need an Air Gap under a Metal Roof?Yes, we always create a ventilated air gap under every metal roof installation. This is a critical step because metal panels conduct heat rapidly and are prone to forming condensation on their undersides when temperatures drop. We use either vertical…
-
What does a Failing Roof Look Like?
Read More »: What does a Failing Roof Look Like?Identifying the signs of a failing roof early can help you avoid expensive interior repairs and structural decay. We recommend monitoring both the exterior of your home and the interior attic spaces for specific indicators of deterioration. On the exterior…
-
Why is Flashing Failure a Leading Cause of Roof Leaks in British Columbia?
Read More »: Why is Flashing Failure a Leading Cause of Roof Leaks in British Columbia?While the provided information highlights several major factors contributing to roof failure in British Columbia, it specifically notes that flashing failure is a critical vulnerability. Flashing seals the transitions around roof protrusions—such as skylights, chimneys, vents, and roof valleys. When…
-
How does Ice Damming Cause Roof Damage During Bc Freeze-thaw Cycles?
Read More »: How does Ice Damming Cause Roof Damage During Bc Freeze-thaw Cycles?During British Columbia’s freeze-thaw cycles, ice damming occurs when snow on the roof melts and then refreezes at the colder eaves. This process creates a barrier of ice that forces water back up and under your shingles, leading to significant…
-
How do I Estimate the Cost of a Flat Roof Replacement for a Commercial Building in Bc?
Read More »: How do I Estimate the Cost of a Flat Roof Replacement for a Commercial Building in Bc?Estimating the cost of a flat roof replacement or repair for a commercial building in BC requires accounting for several site-specific variables. While generic calculators exist, an accurate estimate depends on the specific membrane system, the extent of damage, and…
