Greater Montreal’sEnergy EfficientCost-SavingFree EstimationLifetime WarrantyQuick InstallationFactory Direct Windows & Doors

Fortena Windows & Doors is a team of experts in the supply and installation of replacement windows & doors for entry and patio in Greater Montreal, South Shore and Laval.

We offer modern, secure, energy-efficient PVC fenestration and entry systems for any budget. Based in Saint-Constant, Quebec, Fortena uses only its own trusted local installers and guarantees impeccable window replacement and door installation.

Get $1,500 Window GRANT!

Google Reviews

Window Grant up to

$1,500

Senior Discount

10%

We offer comprehensive financing options powered by FinanceIt.

    
 
 
       Posted on Google  
   
   Laura Pagé 
 
 
 
 Trustindex verifies that the original source of the review is Google. Nous sommes super satisfait des travaux qui ont été fait par l'équipe de Fortena Fenêtres et Portes! Une installation impéccable et professionelle! Je vous les recommande fortement. Une équipe très aimable et à l'écoute de nos besoins :) Merci beaucoup à vous!
  
 
      Posted on Google  
   
   Claudette 
 
 
 
 Trustindex verifies that the original source of the review is Google. Des installateurs attentionnés ,ils sont minutieux et fais un très bon travail. Ils sont très respectueux et ne laisse aucun débris. Nous recommandons cette entreprise.Nous sommes très satisfait de leur travail et de la qualité des portes.
  
 
      Posted on Google  
   
   Stéphane Chamberland 
 
 
 
 Trustindex verifies that the original source of the review is Google. Super service ! Prix compétitif et Alex toujours disponible quand besoin de lui. Agrandissement de porte patio et fenêtre de cuisine. Beau travail !
  
 
      Posted on Google  
   
   Ryma Houari 
 
 
 
 Trustindex verifies that the original source of the review is Google. Vraiment très belle job le boss Alex personne très fiable professionnel je recommande fortement qualité du produit et prix très raisonnable .
  
 
      Posted on Google  
   
   Brahim Alami 
 
 
 
 Trustindex verifies that the original source of the review is Google. Une très belle expérience de professionnalisme, le respect du temps et la qualité de travail. Contact à garder précieusement pour vos prochaines rénovations.
  
 
      Posted on Google  
   
   Marie-France Palengat 
 
 
 
 Trustindex verifies that the original source of the review is Google. Je suis très satisfaite de l'installation. Gens très gentils. Alexandru est une personne très à l'écoute de nos besoins. Je recommanderais sans hésiter
  
 
      Posted on Google  
   
   Rania Ben 
 
 
 
 Trustindex verifies that the original source of the review is Google. Nous sommes très satisfaits de l’excellent travail exécuté avec professionnalisme et compétence par Alex et son collègue, ainsi que des précieux conseils qu’ils nous ont donnés. Leur souci du détail et du travail bien fait a fait toute la différence : ma cuisine est maintenant plus droite qu’elle ne l’était auparavant.
  
 
      Posted on Google  
   
   Amélie Maranda 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service du début à la fin ! L’installation des fenêtres et des portes a été réalisée avec beaucoup de professionnalisme. Le travail est propre, rapide et très efficace. L’équipe est sérieuse, ponctuelle et attentive aux détails, en plus les prix sont très compétitifs. Je suis vraiment satisfaite du résultat final. Je recommande fortement cette compagnie !
  
 
      Posted on Google  
   
   francine davis 
 
 
 
 Trustindex verifies that the original source of the review is Google. Très bon travail effectué par les installateurs; très professionnel; je recommande sans réserve.
  
 
      Posted on Google  
   
   Michel Sylvestre 
 
 
 
 Trustindex verifies that the original source of the review is Google. Installation très réussie de deux grandes fenêtres à battant. Travail minutieux et très soigné. Installateurs serviables. Recommandé sans hésitation!
  
 
  
  
 
 
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Offering the Efficiency and Innovation of Modern Windows & Doors While Providing Competitive Prices and Warranties in Montreal

Innovative entry doors: style meets high performance, security and insulation.

Patio doors in multiple styles and sizes, expertly measured and installed

Energy-efficient PVC windows build for Canada!

Egress basement windows for emergency exit.

Our Expertise in Numbers

With over a decade of experience in windows & doors installation, Fortena Windows & Doors is proudly one of the most locally recommended window installers, trusted for clean workmanship, clear communication, and consistent results.

Years of Experience

Google Rating

Energy Efficiency

Windows & Doors

Save up to $150 per each new window or door!

If you are planning a window replacement or door installation in Quebec, you may be eligible for meaningful rebates through active energy efficiency programs. For homeowners, Rénoclimat can provide up to $150 per eligible door or window. Depending on your building type, additional support may also be available through utility and commercial-focused initiatives that incentivize building envelope upgrades, including eligible window replacements for multi unit and commercial properties. In our full guide, we summarize what is currently open at the provincial, federal, and utility levels, the key conditions to qualify, and the practical steps to apply so you can reduce the total cost of your upgrade without compromising on performance.

Grants for Windows & Doors

High-performance windows & doors built for Quebec’s harsh winters and hot, humid summers.

Empowering Homes With Energy-Efficient Windows & Doors

100%

Triple pane Low E glass with argon fill reduces heat loss, drafts, and condensation for consistent comfort

Energy-efficient frames, warm edge spacers, and high-performance seals cut air leakage, keep indoor temperatures stable

Patio doors and entry doors with enhanced cores, tight weatherstripping, and multipoint locks improve efficiency, comfort, and noise control

Fortena Windows & Doors specializes in high-performance window and door replacement designed for Quebec’s demanding climate. From triple-pane Low-E glass with argon fill to insulated steel and fiberglass entry doors, every product we install is selected for durability, airtightness, and long-term energy efficiency.

Our experienced installers ensure precise measurements, proper flashing, and professional sealing to prevent air leakage, water infiltration, and premature frame failure. The result is a tighter building envelope, improved indoor comfort, and lower heating and cooling costs year-round.

Get a Free Quote & Save

Local Roots in Saint-Constant, Serving Greater Montreal

Based in Saint-Constant, Fortena Windows & Doors serves homeowners and property managers across Greater Montreal’s South Shore and all Montreal neighbourhoods, including Saint-Constant, La Prairie, Candiac, Brossard, Longueuil, Boucherville, Saint-Lambert, Saint-Bruno-de-Montarville, and Chambly. We tailor every window replacement and door installation to the realities of each area. In family-focused communities like Saint-Constant, Saint-Bruno-de-Montarville, Boucherville, Candiac, and La Prairie, our work often involves full retrofits for bungalows, split-levels, and newer two-storey homes, with energy-efficient PVC windows & doors systems and tight, clean finishing. In denser markets like Brossard and Longueuil, we frequently coordinate installs for townhouses, condos, and multi-plexes, with precise measurement, access planning, and consistent results across units.

Greater Montreal’sEnergy EfficientCost-SavingFree EstimationLifetime WarrantyQuick InstallationFactory Direct Windows & Doors

Window Grant up to

$1,500

Senior Discount

10%

Offering the Efficiency and Innovation of Modern Windows & Doors While Providing Competitive Prices and Warranties in Montreal

Innovative entry doors: style meets high performance, security and insulation.

Patio doors in multiple styles and sizes, expertly measured and installed

Energy-efficient PVC windows build for Canada!

Egress basement windows for emergency exit.

Our Expertise in Numbers

Save up to $150 per each new window or door!

Casement Window is crank operated, opening outward for maximum breeze control.

Awning Window is top-hinged, cranks outward, and ventilates even during rain.

Sliding Window glides on tracks, ideal for wide openings and easy use.

Tilt & Turn Window tilts for ventilation, then swings open for cleaning.

Hung Window is vertically sliding, offering classic style and easy ventilation.

Guillotine Window is double-hung, with two moving sashes for flexible airflow.

Bay and Bow Window projects outward, adding panoramic views and extra space.

Egress Window is larger for emergency exit, bringing light to basements.

High-performance windows & doors built for Quebec’s harsh winters and hot, humid summers.

Empowering Homes With Energy-Efficient Windows & Doors

Local Roots in Saint-Constant, Serving Greater Montreal