Lower Mainland Roof Problems
Metro Vancouver and the Fraser Valley are among the most challenging environments for asphalt shingles in Canada. Here's what BC homeowners need to know.
1. Persistent Rainfall & Moisture Damage
Metro Vancouver receives 1,150–1,600 mm of rain annually — one of the highest in Canada. This constant moisture exposure accelerates every form of roof deterioration: it promotes moss and algae growth, causes freeze-thaw damage in winter, and keeps shingles perpetually wet.
Shingles absorb moisture, swell, and contract repeatedly — accelerating granule loss and cracking.
GoNano's hydrophobic treatment causes water to bead and run off rather than being absorbed — dramatically reducing moisture-related damage.
2. Moss & Algae Growth
BC's combination of rainfall, mild temperatures, and tree cover creates ideal conditions for moss and algae. Lower Mainland roofs typically see first moss growth within 3–5 years of installation — far faster than in drier climates.
Moss roots penetrate shingles, lift edges, trap moisture, and accelerate granule loss. Algae staining indicates active biological deterioration.
Professional moss removal followed by GoNano treatment creates a hydrophobic surface that significantly slows regrowth.
3. Freeze-Thaw Cycling
While BC's winters are mild compared to the rest of Canada, freeze-thaw cycling still occurs — particularly in the Fraser Valley and at higher elevations. Water absorbed by shingles expands when it freezes, physically breaking down the asphalt matrix.
Repeated freeze-thaw cycles cause micro-cracking in shingles, accelerating brittleness and granule loss.
GoNano's hydrophobic surface prevents water absorption — eliminating the primary mechanism of freeze-thaw damage.
4. UV Radiation in Summer
BC's summers bring intense UV radiation that depletes the oils in asphalt shingles. This is the primary driver of shingle aging — UV breaks down the petroleum-based oils that keep shingles flexible and waterproof.
Oil depletion causes brittleness, granule loss, and reduced waterproofing — the core symptoms of an aging roof.
GoNano replenishes these depleted oils at a molecular level, restoring the shingle's UV resistance and flexibility.
5. Tree Debris Accumulation
BC's abundant trees — particularly Douglas fir, cedar, maple, and alder — drop needles, leaves, and seeds that accumulate in roof valleys and gutters. This debris traps moisture, provides a growth medium for moss, and blocks drainage.
Debris accumulation creates persistent wet spots that accelerate moss growth and can cause water backup under shingles.
Regular gutter cleaning and debris removal, combined with GoNano treatment, significantly reduces this risk.
Is Your Roof Showing These Problems?
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