Hail
Inside the 2020 storm area
Insurance Bureau of Canada named Calgary, Airdrie, Rocky View County and the surrounding area in the June 13, 2020 hailstorm, almost $1.2 billion in insured damage, and puts Alberta's hail losses at about $6 billion over the five years to 2025. Interlock's Slate, Shake, Cedar Shingle and Mediterranean Tile aluminum panels carry a UL 2218 Class 4 impact rating, listed by Intertek under Delta Building Products. That does not make a roof immune: very large hail can dent metal, and the material warranty excludes hail larger than 38 mm (1.5 in).
Source: Insurance Bureau of Canada, 2020 ↗; Insurance Bureau of Canada, 2025 ↗





































