About QSI

Founded in 1976, 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.

Our newly renovated head office and showroom facility in Hamilton offers fully operational, full size Window, Entry and Patio Door displays… Read More »

A Leader In Our Industry

  • Recipient of the 2019 Consumer Choice Award for the 8th year in a row!
    Best Selection of Windows & Doors
    2011-2019
  • CSA Certified
  • SAWDAC
  • Better Business Bureau Accredited Business
  • Energy Star Canada 2019 Most Efficient

QSI Showroom

353 Arvin Ave, Stoney Creek, ON L8E 2M6
 9051 866 575-8078
Burlington, Oakville & Surrounding
(905) 639-8078

QSI Showroom

1 (866) 575-8078
175 Nebo Rd. Hamilton, ON.

Burlington, Oakville & Surrounding
(905) 639-8078

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All rights reserved. No unauthorized reproduction.

QSI Windows & Doors serving Hamilton, Halton & Niagara … Since 1976 including Stoney Creek, Ancaster, Dundas, Burlington, Milton, Oakville, Brantford, Cambridge, Guelph, Paris, Simcoe, Port Dover, Nanticoke, Selkirk, Jarvis, Cayuga, Dunville, Waterford, Hagersville, Caledonia, Smithville.

logo_footer© 2002-2016 QSI Windows & Doors. | Privacy Policy
All rights reserved. No unauthoried reproduction. Web Design by ADS MEDIA