Doors & Windows

More than 80,000 windows Manufactured each year.

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Manufacturer of environmentally friendly doors and windows

UPVC materials.

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50,000 Happy Customers

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Unisson – The Key to Success

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Save up to 25% OFF with Unisson

Planning to renovate, build a new home, or need replacement windows and doors? We’ve got you covered!

👍 Upgrade to Energy-Efficient Windows and Doors!
👍 Experience the highest quality products at the lowest prices in the market.
👍 Our team specializes in providing tailored solutions for your home.
👍 Enjoy a stress-free and seamless process, from free estimation to installation.

LIMITED OFFER 25% DISCOUNT on Windows/Doors and Installation

Thousands of homeowners choose us for their windows every year, see why!👇

Hurry, this exclusive deal ends soon!⏰

Click below to schedule your FREE estimation call with our experts today 👇

🏆 Exciting Announcement for Our Valued Clients! 🏆

🌟 Unisson Groupe Montreal Inc is incredibly proud to share some amazing news with all of you! 🌟

🎉 We are thrilled to have been recognized as one of the Top 3 Entreprises de fenêtres in Montreal, QC by the prestigious ThreeBestRated organization! 🪟🥇 This recognition reflects our unwavering commitment to providing you with the highest quality window solutions.

At Unisson Groupe Montreal Inc, we are committed to enhancing the beauty and functionality of your spaces with our exceptional window solutions. Thank you for trusting us with your window needs. 🪟✨

Join Us at the Montreal National Home Show 2024 and Enjoy Exclusive Bonuses!

We’re thrilled to announce Unisson Group’s participation at the Montreal National Home Show from March 7-10, 2024, at the Palais des congrès in Montréal, QC. Visit us at Booth #244 to explore our latest home solutions and meet our dedicated team.

This year, attendees will receive special bonuses and discounts exclusively from the Unisson Groupe team. It’s a fantastic opportunity to discover new trends, technologies, and ideas in home improvement, while enjoying exclusive offers. Don’t miss out!

For more details, visit Montreal National Home Show.

UNISSON DOORS AND WINDOWS
THE KEY TO LUXURY AND COMFORT AT HOME

Modern home featuring Unisson Groupe's energy-efficient UPVC windows and contemporary exterior door.

Modern home with Unisson Groupe's energy-efficient UPVC windows and contemporary exterior door.

Residential installation featuring Unisson Groupe's energy-efficient UPVC windows.

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OUR COMPANY MISSION:

OUR COMPANY IS PROUD TO OFFER YOU THE FINEST QUALITY OF DOORS AND WINDOWS, AT UNISSON WE VALUE CRAFT AND HONESTY ABOVE ALL.

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Unisson 100% UPVC windows are exclusively developed with caring and exact craftsmanship. Our process guarantees beautiful, unique and lavish windows every single time.

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At Unisson groupe we value the environment greatly, and that’s why we factor energy efficiency in the making of our products.

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All of our windows are made to meet the highest of industry regulations and specifications for energy efficiency.

Whether you’re building a new home or thinking of renovating yours, choose Unisson for doors and windows that are fully energy efficient, low maintenance and visually breathtaking. Built to match the highest industry standards, our doors, windows and window panes add a luxurious touch to your home, while making it more comfortable to live in and ensuring that it’s well-ventilated.

Choose from a wide variety of window types, like casement and bay windows, as well as a vast array of aesthetic options to customize your windows exactly to your liking and to match your home décor: from stylish grids, to a variety of outdoor and indoor options, as well as colour schemes and designs, Unisson doors and windows are a sure way to enhance your home both from both a visual and functional standpoint.

Our windows are strong, energy efficient and easy to maintain. Plus, we don’t mass produce: every window is customized down to the finest detail to suit every customer’s specific needs, so you can rest assured that you are being provided with windows that are absolutely perfect and tailored to your home.

Get our FREE Consumer’s Guide

The Consumer’s Guide provides shopping tips on how to properly buy replacement energy-efficient windows and doors . It also provides useful technical information, including how to install replacement windows & doors.

OUR BLOG

Low-E Coating Windows Explained: Benefits for Montreal Homes

Low-E coating windows explained: this advanced glass technology helps Montreal homeowners retain heat during harsh winters while blocking UV rays and reducing energy bills. With January temperatures regularly dropping below -15°C, untreated glass allows significant heat transfer, increasing heating costs and indoor discomfort. Low-emissivity coatings work by reflecting infrared heat back indoors while allowing natural light to pass through, improving insulation without darkening your home. When paired with argon gas and triple-pane systems, Low-E windows can reduce energy loss by up to 30–50%, lower U-values, and qualify for Quebec rebates such as Rénoclimat. This guide explains how Low-E coatings work, how they compare to other window glass types, and why they are especially effective in Montreal’s climate.

Window Air Leakage Problems: How to Keep Montreal Homes Warm & Efficient

Window air leakage problems in Montreal homes are a major source of heat loss during harsh winters, where temperatures regularly drop below -15°C. Even small gaps around aging frames or worn seals can account for 25–40% of heating energy loss, leading to drafts, condensation, uneven temperatures, and rising utility bills. In neighborhoods like Laval, Brossard, and the West Island, homeowners often notice cold spots near windows despite high furnace output. The solution lies in identifying the causes — poor installation, deteriorated weatherstripping, warped frames — and upgrading to energy-efficient, airtight window systems designed for Quebec’s climate. This guide explains the most common air leakage issues in Montreal homes and the premium solutions that improve warmth, comfort, and long-term efficiency.

Window Condensation Problems: Causes & Solutions for Montreal Homes

Struggling with window condensation in your Montreal home? Discover the causes, health risks, and expert solutions including triple-pane windows, Low-E coatings, and energy-efficient upgrades designed for Quebec winters.

What our clients say

Serge came out this evening for a consultation. He was extremely thorough and knowledgeable. He was also very patient with us as we knew exactly what we wanted.. I would highly recommend giving Unisson a call for any of your window needs.

Terrisa Cosan

Recently we had Unisson do some work on our house in Montreal. They are top-notch in quality but in something else I value–communication. François stayed in touch about our schedules, product options and really helped us make good choices. Then once the work began we could see that he and his team did a top notch job. We are very impressed with the work.

Tom Melville

I am so delighted with Unisson, and the ease of buying a window and not having anything go wrong in any way! It is one of the best buys I have ever made. I am thrilled with the expertise each person has had in meeting my needs. It is such a pleasure to do business with you, and I’m telling everyone I know to get the Unisson to do their work for them. Thanks so much for it all, and God Bless each one of you.

Antione Cano