About QSI

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 large showrooms in Hamilton and Burlington offer fully operational, model size Windows, Doors and Sunrooms.  Customers are invited to experience the feel, quality and workmanship that are synonymous with our Windows, Doors and Sunroom Products, Service, Installation and People.
 
We are extremely proud of our people, our products and our relationships with our many, many customers and friends.