Building envelope experts
Door and window installation in Montreal and on the South Shore
Feeling cold drafts near your windows or a door that closes poorly? We replace your windows and doors hassle-free, triple glazing available, permits included, airtight result guaranteed.
Our partners
Cladding specialist
Your door and window installer
Outdated windows, failing seals or doors letting the cold in? We measure, order and install premium doors and windows, residential or commercial. Double or triple glazing to suit your needs, code upgrades included and permit management. The result: less energy loss, more comfort, less noise.
No more drafts
Eliminating air infiltration instantly improves the comfort of your home.
Energy savings
Modern triple-glazed windows lower your heating costs from the first winter.
Greater security
Multi-point locking systems, reinforced glazing, your home is better protected.
Property value
New windows improve the look and increase the resale value of your property.
Our expertise
Our window installation expertise
Hundreds of doors and windows installed in Montreal, Laval and on the South Shore, with special attention to airtightness.
Years of experience
Windows installed
Google rating
sq. ft. installed
How it works
The steps to get your cladding replaced
Taking measurements
A technician comes to precisely measure each opening to order custom products.
Product selection
Choice of model, glazing and options based on your budget and energy needs.
Permit verification
We check whether a permit is required and handle it if needed.
Airtight installation
Removal of the old unit, installation of the new one with sealing membranes and caulking.
Final inspection
Airtightness test, hardware adjustments and full cleanup.
They trust us
“Nous avons fait appel à EJA pour le revêtement extérieur (acier MAC) de notre agrandissement. Nous avons été en contact avec Emir pour la planification du projet et avec Jérémy et leur équipe pour l'exécution. Nous sommes très satisfaits de la qualité et de la rapidité d'exécution du travail effectué. Les commentaires Google, sur lesquels nous nous sommes fiés, sont bien fidèles à la réalité. Je recommande donc grandement les services de l'entreprise EJA pour vos projets de revêtement extérieur.”
“Mon premier contact avec l'équipe a été avec Emir. Il est venu rapidement, retournait ses appels. Il m'a bien accompagné pour la soumission, le permis et s'est montré patient avec le financement. Ensuite, Jérémie et son équipe ont fait la pose. Ils sont respectueux, vérifient les morceaux avant de les installer et ont corrigé des défauts sur la maison pour empêcher l'eau de s'infiltrer. À la fin de chaque journée, Jérémie faisait le tour avec nous et le chantier restait propre. On n'a pas eu de surprise, la communication était bonne et les délais respectés. Je recommande !”
“J'ai fait appel à EJA pour le revêtement extérieur de ma maison, qui était vraiment en mauvais état. Je suis absolument ravi du résultat : l'équipe a travaillé avec un grand souci du détail, et le changement est spectaculaire. Ma maison a retrouvé toute sa beauté, presque comme neuve. Je recommande vivement leurs services à quiconque veut redonner vie à l'extérieur de leur maison.”
“Très bonne expérience avec Jérémie et son équipe ! On a fait refaire une terrasse en hauteur, qui sert aussi de toit, et permet l'écoulement des eaux. L'équipe a bien travaillé dans des conditions météo difficiles et en hauteur. Le résultat est bien fait. Les communications étaient bonnes.”
“Excellent service. On a fait appel à EJA pour des travaux de calfeutrage pour notre copropriété. Très pro, bonne communication avant, pendant et après les travaux. 5/5”
“Les Entreprises EJA did an excellent job on the complete overhaul of the wooden siding of our chalet, and stand highly recommended for their reliability and conscientious work! Emir, Jeremie and their team reassured me that there are still hardworking young people out there, for whom a job well-done is not only a question of money well-earned, but also of professional pride and honor!”
Reviews published on Google
See all 78 reviews on GoogleStep 1 — On-site assessment
What we check before installation
Before ordering anything, our technician assesses each opening to guarantee a flawless installation.
Opening dimensions
Precise measurement of each window and door for a custom order without excessive gaps
Condition of frames and lintels
Inspection of the structure around openings to detect any rot or sagging needing repair
Current sealing
Assessment of existing air and water infiltration to choose the right membranes
Existing thermal performance
Evaluation of the current glazing and calculation of possible energy savings with a replacement
Required glazing type
Recommendation between double or triple glazing based on orientation, exposure and your budget
Hardware and accessories
Assessment of handles, locks, screens and other accessories to replace or keep
Step 2 — Regulations and permits
We handle everything. You have nothing to do.
Many municipalities require a permit before replacing exterior cladding. At EJA, it is included in our service: we check local requirements, prepare the documents and manage the process for you.
Checking municipal requirements
Every city has its own rules. We review your municipality’s bylaws before submitting anything.
Permit application if required
We prepare the documents, the plans and the complete file. We submit on your behalf and follow up.
Building Code compliance
All our work meets the requirements of the Quebec Building Code and current RBQ standards.
Service areas
We travel
everywhere for you
Montreal
- Verdun
- Lachine
- Plateau Mont-Royal
- Saint-Laurent
- Westmount
- Ahuntsic
- Anjou
- Griffintown
South Shore
- Longueuil
- Brossard
- Châteauguay
- Boucherville
- Saint-Jean-sur-Richelieu
- Sainte-Hyacinthe
- Saint-Bruno
North Shore & Laval
- Laval
- Blainville
- Boisbriand
- Mirabel
- Rosemère
- Terrebonne
- Mascouche
Don't see your area? Contact us to discuss your project.
Step 3 — Choosing the materials
Our available products
We offer a selection of windows and doors to suit every style and budget.
Double and triple glazed windows
High-performance glazing for maximum thermal and acoustic insulation.
Strengths
- Exceptional thermal insulation
- Reduced outside noise
- Guaranteed energy savings
- Triple glazing available
Exterior doors
Fiberglass, steel or wood doors, durable, insulating and attractive.
Strengths
- Exceptional durability
- Superior thermal insulation
- Reinforced security
- Minimal maintenance
Patio and sliding doors
Modern patio access with aluminum tracks and anti-condensation glazing.
Strengths
- Modern, clean design
- Maximum opening
- Smooth, silent tracks
- Built-in anti-condensation
Panorama-style windows
Large glazed surfaces to maximize light and the outdoor view.
Strengths
- Maximizes natural light
- Exceptional panoramic views
- Slim, discreet frames
- Contemporary architectural design
Step 4 — Detailed quote
A clear quote, no surprises
Your quote includes materials, labor, timeline and warranties. Here are the 4 factors that make a project’s cost vary.
Product type
Window, door, sliding patio door, each type has its price. Glazing (double or triple) and insulation options also affect the cost.
Number of openings
The number of windows and doors to replace is the main factor. A volume replacement is usually more economical per unit.
Installation complexity
Oversized openings, needed frame repairs or special architectural configurations add time.
Options and accessories
Triple glazing, argon or krypton-treated glass, decorative grilles, built-in blinds, each option personalizes and affects the price.
Step 5 — Installation day
An installation done by the book.
A durability guarantee for your exterior cladding
Guaranteed and certified installation
When Les Entreprises EJA install your cladding, you walk away with much more than a beautiful facade. Every project is covered by the manufacturer warranty:
- Manufacturer warranty : From 10 to 25 years depending on the manufacturer and product
- Installation to RBQ standards : Each installation is done according to the Quebec Building Code
- Code upgrades : We handle structural upgrades if needed for a flawless installation
Materials per the manufacturer + 15 to 20 years.
Resources and articles
Find answers, tips and guides to better understand exterior cladding and your options.
Frequently asked questions
Everything you want to know
Have other questions? Our team is here to help, at no cost and with no obligation.
Are windows in Montreal energy efficient?
Windows in Montreal are designed to be energy efficient, providing excellent thermal insulation and reducing heating and cooling costs.
What is the window replacement process?
The process consists of removing the old windows, preparing the opening, installing the new windows, then ensuring sealing and finishing.
Are permits required?
Permits are required for door and window installation in some municipalities. It is important to check local requirements in Montreal and on the South Shore, we take care of it for you.
What types of windows are there?
Window types include casement windows, sliding windows, single-hung windows, fixed windows and bay windows.
How long does installation take?
The duration of the installation depends on several factors, but in general it takes between one and three days.
How do I know if my windows need replacing?
Check for signs such as drafts, cracks, excessive condensation between the panes or difficulty opening and closing the windows.
Are there financing options for window installation?
There are financing options for window installation at Les Entreprises EJA, allowing you to stay within your budget.
Related services
Our other services
Complete exterior cladding, insulation and renovation solutions for homes and commercial buildings.
Recommended service
Cladding installation
Installation of exterior cladding from every brand. Trim finishing and replacement of existing materials.
Learn more
Insulation installation
Installation of insulating panels and optimization of the property's thermal barrier.
Learn more
Balconies and decks
Construction and renovation of balconies and decks. Framing and finishing.
Learn more
Garage door
Installation in a single day, steel, aluminum or wood, motorized or manual, warrantied up to 20 years.
Learn more
Have a project in mind?
We guide you from planning to final cleanup. Get your free quote — our team travels at no cost to assess your project.