Replacement Windows

Our RevoCell window is made of microcellular PVC which makes it stronger and more durable
QSI’s RevoCell® window technology is an industry game-changer. Featuring a solid-core, one-piece structural construction, RevoCell® windows combine the ease of maintenance of PVC windows with the high strength and superior insulation of microcellular PVC, to produce a window that is brighter, more energy efficient, and more durable. It is Canadian, it’s revolutionary, and it’s affordable.

Founded in 1976, QSI is one of the Golden Horseshoe’s most reputable Window Replacement 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 Window displays for you to come and visit. Customers are invited to experience the quality that is synonymous with our high performance product, installation and people.

QSI are your window installation experts in Burlington, Hamilton, Grimsby, Oakville and any surrounding areas.

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Casements & Awnings

Contemporary style casement and awning windows deliver maximum ventilation as well as optimum efficiency against air infiltration.

Vertical Sliders

Traditional style combined with current technology and ease of cleaning.

Horizontal Sliders

Traditional style with large unobstructed view combined with maximum ventilation.

Bows & Bays

Expand the feel of your living space and enhance the view while adding a classic traditional look to the exterior.

Specialty Shapes

Replace your architecturally shaped windows with maintenance free PVC SMARTComfort technology.