Business Details
50 Years
experience
Trusted Window and Door Solutions in Stoney Creek, ON
Founded in 1976, Qsi Windows & Doors has established itself as a trusted leader in the Golden Horseshoe region for high-quality window and door solutions. Our team of dedicated professionals brings decades of combined experience to every project, specializing in energy-efficient products like RevoCell windows and ENERGY STAR-rated doors that combine cutting-edge technology with durability. We prioritize customer satisfaction through personalized consultations, expert installations, and a commitment to using materials that meet rigorous industry standards such as CSA-A440 compliance.With a 6,000 sq ft showroom in Stoney Creek, we serve homeowners in Hamilton, Oakville, Burlington, and surrounding areas, offering tailored solutions that enhance both the functionality and aesthetic appeal of residential properties. Our reputation for excellence is built on a foundation of transparency, reliability, and a customer-centric approach that ensures every client receives the highest level of service from consultation to completion.
Services
Windows
Doors
Patio Doors
RevoCell Windows
ENERGY STAR-rated Products
Details
- Year established: 1976
Highlights and features
- We have over 45 years of experience in residential window and door installations.
- Our products are ENERGY STAR Most Efficient 2025 certified for superior performance.
- We offer flexible financing options to suit various budgets.
- Our team provides expert installations backed by customer testimonials.
- We serve the Golden Horseshoe region with localized expertise.
Associations and certifications
- ENERGY STAR
- CSA-A440
What people say
Efficient and competent
Top marks
Excellent
Money well spent
Prompt service
Services
Windows
QSI's RevoCell windows combine microcellular PVC with energy-efficient design for durability and thermal performance. These Canadian-made windows reduce heat loss, lower energy bills, and require minimal maintenance. Ideal for Southern Ontario's climate, they feature solid-core construction and meet ENERGY STAR Most Efficient 2025 standards.
Doors
Custom-designed steel or fibreglass entrance doors enhance curb appeal and security. ENERGY STAR-approved with magnetic weather stripping for airtight seals. Available in 24 standard colours, these doors offer insulation, durability, and low maintenance while complementing home aesthetics.
Patio Doors
Strassburger patio doors feature multi-chamber designs for insulation and durability. Options include French swing or sliding styles with triple-glazed glass, steel reinforcement, and 25-year warranted finishes. Ideal for Canadian climates, they provide security, energy efficiency, and aesthetic appeal.
RevoCell Windows
RevoCell technology uses solid-core PVC for superior strength and insulation. These windows resist warping, offer brighter interiors, and meet ENERGY STAR standards. Designed for Canadian winters, they combine low maintenance with advanced thermal efficiency to reduce energy costs.
ENERGY STAR-rated Products
ENERGY STAR-certified windows and doors reduce energy consumption by up to 12%. Features include Low-e glass coatings, argon gas fills, and magnetic weather stripping. These products qualify for rebates and improve home comfort while lowering utility bills.
People
Terry Bobiak
Founder
Terry Bobiak founded Qsi Windows & Doors in 1976, bringing over four decades of expertise in window and door technology. He specializes in energy-efficient solutions and customer-focused innovation, guiding QSI to become a regional leader in residential installations.
Questions
Why is there condensation on my new windows?
New energy-efficient windows are airtight, trapping warm, moist air that condenses on cold glass surfaces. This is normal and indicates proper insulation.
Can I reduce condensation on my windows?
Yes, by managing indoor humidity levels through ventilation, dehumidifiers, or adjusting thermostat settings during extreme weather.
What causes exterior condensation?
Exterior condensation occurs in humid conditions when cool glass surfaces meet warm, moist air, typically in late summer or early fall.
How do QSI windows improve energy efficiency?
QSI windows use RevoCell technology and Low-e coatings to minimize heat transfer, reducing energy loss and lowering heating costs.
What financing options are available?
QSI offers flexible financing plans, including options independent of the Greener Homes Loan program, for affordable monthly payments.
Reviews (6)
Paul Slizys
May 30, 2021
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Order two entry doors and an 8' sliding patio door back in September 2020 with a very large upfront deposit and it is now May 2021 and we are still waiting for the doors and the installation. Since the purchase to Nordik the service has fallen downhill. I'd suggest looking elsewhere because I'm forced to now chase for my refund or my doors
Corey Pitre
May 20, 2021
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QSI isn't the same since they were acquired by Nordik. Service after the sale is absolutely lacking. Had problems with my awning and patio door. It took over a week and had to complain just to get the service department to call me back and book appointment. Tech didn't show up for first appointment - I had to alter my work schedule to accommodate the Tech two times, once for the missed appointment then for the appointment he actually showed up. Part ordered for door and QSI had to contact awning manufacturer for awning issue. Over eight weeks later, still haven't heard back from QSI. Called
Anna Suchecki
Jan 17, 2021
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OK but not great and some frustrations. Warranty is great but work and communication were careless at times. Service had to come back several times mainly since the glass itself had markings or defects and to fix sloppy caulking. At least those people were friendly and were able to fix over time problem areas. At install time no tarps or covers were used and sharp pieces of metal from cutting edging were all over my property. I'm glad I found them before my kids did, there were over 20 sharp metal triangle shaped pieces. Also plastic cut off tips from caulking were all over my property as well
Roger Mongeon
Nov 20, 2020
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Critical:Responsiveness
We had a dozen windows installed February 2020 by QSI. Since then their customer service has been terrible. No follow up. We've got windows that require servicing, and we're left on our own. I would not recommend them. Move on
Services:Window installation,Glass installation
We had a dozen windows installed February 2020 by QSI. Since then their customer service has been terrible. No follow up. We've got windows that require servicing, and we're left on our own. I would not recommend them. Move on
Services:Window installation,Glass installation
Mark Cipolla
Jul 13, 2020
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After the installation of over 7000$ for three new doors in January 2020, I realized that a gap was left between the frame and the fascia . I contacted QSI to have the problem resolved and the woman told me they were shut down for COVID-19 but as soon as they start working again I will be a priority. After opening I contacted the service department leaving numerous messages. It has taken them 3 weeks to get back to me and now they are unable to work around my schedule to fix the problem they created 6 months ago. Also the woman told me they are too busy because they are merging three companies
John Smith
Dec 23, 2019
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Salesmen talk a big game, when the installers came they were all rude. We got a big Bay window installed that has leaked from day one and no one will come fix. The manager will not even come and look it. We will never shop here again. We highly recommend going somewhere for Windows and door.
