IKO roof shingles typically last 20 to 30 years in Canadian conditions with proper installation, ventilation, and maintenance, which is standard for modern fiberglass architectural asphalt shingles. IKO's product lines have different expected lifespans. IKO Marathon 25 three-tab shingles are rated for 20 to 25 years. IKO Cambridge architectural shingles, one of Canada's best-selling lines, typically last 25 to 30 years. IKO Dynasty with ArmourZone technology, which has heavier mats and enhanced sealant, typically lasts 25 to 30 plus years with high wind resistance up to 130 mph. IKO Nordic, designed for extreme cold with SBS modified asphalt for flexibility at low temperatures, also lasts 25 to 30 years. Actual lifespan depends heavily on factors like attic ventilation, proper installation with correct nailing in ArmourZone area, climate exposure, roof slope, and color, with darker shingles absorbing more heat and potentially aging faster. In harsh Canadian climates with ice dams, heavy snow, and freeze-thaw cycles, well-ventilated IKO shingles can reach their warranty periods, while poorly ventilated roofs may fail earlier at 15 to 20 years. IKO offers limited lifetime warranties with 10 to 15 years non-prorated protection against manufacturing defects and 10 years algae resistance warranty. With annual maintenance including gutter cleaning and inspection, many Canadian homeowners report IKO shingles lasting beyond 25 years.
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