Stoney Creek, ON
A QSI sales representative points to a $40,000 interest-free loan graphic

Interest-Free Loans up to $40,000 Available via the Greener Homes Initiative

RevoCell® windows are eligible for the highest financial incentives available through the Greener Homes Initiative. Homeowners planning energy-efficient retrofits can still apply for an interest-free loan of up to $40,000 from the Canada Mortgage and Housing Corporation (CMHC).

Apply now before the funds run out!

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Replacement Windows in Hamilton


Upgrade your home with Energy Star Most Efficient 2024 Windows.

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Replacement Doors in Hamilton


Individual, aesthetically stunning, Replacement Doors to increase curb appeal.

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Replacement Patio Doors in Hamilton

Patio Doors

Light the light shine in with amazing Patio Door options.

A beautiful Hamilton home with replacement QSI windows.

Quality Service & Installations

Serving the Golden Horseshoe since 1976!

Serving the Golden Horseshoe for over 40 years, the secret to our success is really no secret at all – we take great pride in our quality, service, installations and our people. “Everyone at QSI is committed to the best window and door installation experience possible and this has been our guiding principle since 1976.”

Rely on QSI for best performance windows and doors. We are proud to offer RevoCell® windows, featuring the latest in advanced technology and qualifying for the Energy Star Most Efficient rating.

At QSI, we’re your local experts for high-end windows and doors in Hamilton and the area, including: Oakville, Burlington, Niagara, Grimsby, Halton & all surrounding municipalities. We proudly feature all our quality products on display in full scale, just how they would be installed on your own home. Our new showroom in Stoney Creek is worth the drive to Hamilton!


Words from our Valued Clients

Trust the window and door experts!

Let us do what we do :) – which is make your vision a reality.

Thank you!
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In-home consultation. No obligation.

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