About QSI Windows & Doors

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 newly renovated 6,000 sq ft head office and showroom facility in Hamilton offers fully operational, full size Windows Door, Sunroom and Patio Awning displays. Customers are invited to experience the quality that is synonymous with our high performance product, installation and people.

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

Terry Bobiak
President and Owner
QSI Windows and Doors

Team QSI
Together Everyone Achieves More