Founded in 1976, by Terry Bobiak, QSI is one of the Golden Horseshoe’s most reputable Window, Door and Sunroom companies, with sales and installation teams working year round – remarkable given the harsh Southern Ontario winter weather.

QSI’s two huge showrooms in Hamilton and Burlington offer fully operational, full size Windows, Doors and Sunrooms. Customers are invited to experience the quality that is synonymous with our Windows, Doors, Sunrooms, Service, Installation and People.

We are extremely proud of our people, our relationships with our many customers, friends and suppliers.

Total customer satisfaction is our top priority.

Effort by everyone on “Team QSI” is the key to our success. Our unity and security is our common
bond in making each member of QSI responsible for his or her actions.

Attention to detail and pride in our workmanship, assures dignity and worth in the services we provide.

Market place leadership, allowing for reasonable margin, continued healthy operations and stable employment and service.


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