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 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… Read More »

A Leader In Our Industry

  • Recipient of the 2018 Consumer Choice Award for the 7th year in a row!
    Best Selection of Windows & Doors
    2011-2018

  • CSA
  • SAWDAC
  • Better Business Bureau
  • Energystar Most Efficient 2016

QSI Showroom

175 Nebo Rd. Hamilton ON.
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 | Web Design by ADS MEDIA

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