75 Years of Sheltering the World: IKO’s Journey from a Small Canadian Mill to a Construction Cornerstone.
In the world of construction, few names carry the weight of “proven performance” quite like IKO. As the company prepares to celebrate its 75th anniversary in 2026, it marks a milestone that resonates far beyond its Canadian origins, reaching deep into the fabric of the building industry.
For architects, contractors, and homeowners, IKO has become synonymous with durability. But the story of how a small paper mill in Calgary became a global leader in roofing, waterproofing, and insulation is one of family legacy, vertical integration, and a relentless commitment to quality.
From Humble Beginnings to Global Reach
The IKO story began in 1951, when Isidore Koschitzky founded the company in Calgary, Alberta. What started as a modest manufacturing plant for building paper soon expanded into asphalt shingles. By the 1950s, IKO was already setting the pace for the industry, driven by a philosophy of “vertical integration”—the idea that to ensure the best quality, you must control every step of the manufacturing process.
This pioneer spirit saw IKO expand across Canada and into the United States, but it was the leap across the Atlantic in the 1970s that cemented its global status. Establishing its European headquarters in Belgium, IKO began its journey toward becoming a vital partner for the European and, specifically, the Irish and UK construction sectors.
One of the most remarkable aspects of IKO’s 75-year history is that it remains a family-owned business. Now entering its fourth generation of Koschitzky family leadership, the company maintains a long-term vision often lost in the world of public corporations.
For the Irish and UK market, this stability is a significant advantage. It allows IKO to invest heavily in its “vertical integration” model. IKO doesn’t just assemble products; they manufacture their own glass felt, oxidise their own asphalt, and crush their own rock for granules. This total control over the supply chain means that when an IKO product arrives on a site in Cork or Belfast, it meets a global standard of excellence that has been refined over seven and a half decades.
Innovation for a Greener Future
As IKO celebrates its 75th year, the focus is firmly on the future. The construction industry is currently undergoing a green revolution, with a heavy emphasis on sustainability standards.
IKO has pivoted to meet these demands, developing sustainable roofing systems that contribute to a building’s circular economy. Their 75-year milestone is not just a look back at where they have been, but a launchpad for the next generation of eco-friendly building envelopes.
From Isidore Koschitzky’s first mill in 1951 to the cutting-edge waterproofing systems protecting infrastructure today, IKO’s 75-year history is a testament to the fact that while technology changes, the need for a dry, warm, and secure roof remains a constant.
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