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Class 4 Impact Rated · Storm Damage Specialists · Free Inspection
Class 4 storm-rated shingles that protect BC homes from hail, wind, and debris — with potential insurance premium reductions.
BC's weather is becoming more volatile. Impact-resistant roofing is no longer a premium option — it is a risk management decision. Fixed-price contracts, certified installation, free on-site inspection.
Book Your Free Inspection All Roofing ServicesWhy It Matters in 2026
Environment Canada data shows an increase in high-intensity precipitation events, wind storms, and hail events across BC's Lower Mainland and Fraser Valley over the past decade. Communities in Abbotsford, Langley, Chilliwack, and the Fraser Valley corridor have experienced documented hail damage. North Shore properties are exposed to wind-driven debris from the mountain corridors. Delta and Richmond face elevated wind loading from open terrain.
Standard architectural shingles are designed for normal weather loads. Class 4 impact-resistant shingles are engineered for the conditions BC is increasingly experiencing. The cost premium over standard shingles is modest. The protection difference is significant.
UL 2218 Class 4 is the highest impact classification for roofing. The shingle must survive a 2-inch steel ball dropped from 20 feet with no crack or puncture. Standard shingles carry no impact rating or Class 1-2 ratings that do not qualify for insurance discounts.
Many major BC home insurers — including Intact, Wawanesa, Aviva, and others — offer documented premium reductions of 5-30% for Class 4 installations. The reduction varies by insurer and policy. Stonnex provides certification documents needed to file the discount claim with your insurer.
Impact-resistant shingles use a reinforced fiberglass mat and polymer-modified asphalt that resists granule loss, bruising, and cracking from normal weather wear — not just extreme events. This contributes to a longer effective lifespan compared to standard architectural shingles.
Class 4 shingles are typically paired with enhanced wind ratings of 130-160 km/h. Most carry a Class H wind rating, versus the 110-130 km/h typical of standard architectural shingles. Critical for exposed Fraser Valley and North Shore properties.
Product Comparison
| Feature | Class 4 Impact-Resistant | Standard Architectural |
|---|---|---|
| Impact Rating | Class 4 (UL 2218) | Class 1-2 or unrated |
| Wind Resistance | 130-160 km/h | 110-130 km/h |
| Insurance Discount | 5-30% (varies by insurer) | Not applicable |
| Hail Protection | 2-inch impact tested | Not rated |
| Granule Retention | Enhanced (polymer modified) | Standard |
| Expected Lifespan | 25-35 years | 20-25 years |
| Upfront Cost Premium | 8-15% over standard | Baseline |
| Storm Claim Risk | Significantly reduced | Higher exposure |
| Certification Documents | Provided for insurer | N/A |
Recommended For
Abbotsford, Chilliwack, Langley, and Mission experience documented hail events and valley wind channelling. Class 4 shingles are our standard recommendation for all Fraser Valley replacements.
Open flat terrain in Delta and Richmond creates elevated wind loading across exposed rooflines. Impact-resistant shingles with Class H wind ratings provide meaningful additional protection.
Wind-driven debris events from the North Shore mountain corridors, combined with heavy snowfall, create above-average impact load on North Vancouver and West Vancouver rooflines.
Given the modest 8-15% cost premium and the potential insurance savings, Class 4 shingles are worth considering for any BC roof replacement — not only high-exposure properties. Stonnex advises on a case-by-case basis during inspection.
Common Questions
Stonnex provides complimentary on-site inspections to assess existing storm damage and advise on impact-resistant replacement options. No obligation. Written quote provided.
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BBB Accredited Business
Stonnex Roofing is an accredited member of the Better Business Bureau — a recognized standard of trust for homeowners across British Columbia.