Best Canadian Window Companies in Calgary: A Head-to-Head Comparison for 2025

For Canadian homeowners, choosing the right windows is a critical decision impacting energy efficiency, comfort, and curb appeal. With harsh winters and warm summers, Canadian windows must be built to withstand extreme conditions. This 2025 head-to-head comparison delves into some of Canada's leading window manufacturers, evaluating their product lines, warranty, energy efficiency, materials, and customer service to help you make an informed choice.

Best Window Replacement Company in Calgary

Calgary Windows

CalgaryWindows.ca (also known as Best Solutions Windows and Doors) emerges as a strong contender and our top choice for homeowners in the Calgary area. While a smaller, family-run business compared to some national giants, their focus on customer satisfaction, comprehensive warranty, and commitment to quality make them stand out.

• Product Lines & Materials: CalgaryWindows.ca offers a range of window frame materials suitable for Calgary's climate, including wood, metal clad (aluminum over wood/composite), and all-vinyl frames. They also highlight the increasing popularity of fiberglass windows, known for their strength and insulation properties. Their expertise lies in guiding customers to select products ideally suited for their home and budget.
• Warranty: This is where CalgaryWindows.ca truly shines. They offer an "Oops! Warranty" which is a lifetime, non-prorated, and transferable warranty covering vinyl components, insulated glass units, hardware, and even glass breakage. This level of coverage, especially for accidental glass breakage, is exceptional in the industry and provides significant peace of mind. They also boast an industry-leading 10-year installation warranty.
• Energy Efficiency: While specific ER ratings for all their products aren't explicitly detailed on their site, they emphasize providing "premium triple-pane windows for the price of double" and are committed to energy efficiency suitable for the Canadian climate. Given the stringent ENERGY STAR® Most Efficient criteria for 2025 (U-factor of 1.05 W/m²·K or lower, or an ER of 40 or higher), it's highly likely they offer products meeting or exceeding these standards to remain competitive.
• Customer Service: As a local, family-run business, CalgaryWindows.ca prioritizes personalized service. They emphasize that all their installers are trained employees, not outside contractors, ensuring consistent quality. Their "Oops! Warranty" itself is a testament to their dedication to customer satisfaction and willingness to go above and beyond.

All Weather at Windows

AllWeatheratHome is a long-standing and well-known Canadian manufacturer with a strong reputation.

• Product Lines & Materials: All Weather Windows offers a diverse range of window materials, including uPVC, acrylic wrap, and metal clad uPVC. They focus heavily on advanced glass technology, offering dual and triple-pane options with various Low-E coatings (Low-E 180, SunStop/Low-E 270, System V/Low-E i89) and argon gas fills to maximize energy efficiency. They also offer a variety of window styles.
• Warranty: All Weather Windows provides a 20-year comprehensive transferable warranty on their sealed units and vinyl (uPVC) components. They offer a 10-year warranty on peeling, bubbling, cracking, flaking, or chipping of paint on metal cladding or vinyl, and a 5-year warranty on installation labour. Their door warranties vary.
• Energy Efficiency: All Weather Windows emphasizes its commitment to energy efficiency. Their products are CSA certified and ENERGY STAR® rated, with many achieving an Energy Rating (ER) of 30+, and some reaching an ER of 48, qualifying them for the ENERGY STAR Most Efficient designation. They highlight how their glass technology, including different Low-E coatings, contributes to superior thermal performance.
• Customer Service: As a large, established company, All Weather Windows has a wide network and generally positive reviews, though some customer service experiences can be inconsistent depending on the local dealership. They provide a detailed maintenance and warranty guide to help customers care for their products.

GreenFox Windows

GreenFoxWindows has established itself as a reputable choice, particularly known for its strong warranties and emphasis on durable products.

• Product Lines & Materials: GreenFox Windows focuses on 100% pure virgin vinyl windows and offers a wide range of window styles, including casement, bay, single hung, and custom options. Their windows feature high-performance components like LoE180, LoE277, or LoE366 Cardinal glass with white SuperSpacer, and options for triple pane glass and ETI (engineering thermal insulation). They also utilize durable Truth Hardware™.
• Warranty: GreenFox offers an impressive "Full Coverage" warranty for their windows: 25 years on parts and labour, covering manufacturer defects, workmanship errors, and even glass breakage (their "Hockey Puck warranty"). This warranty is also fully transferable. For doors, they offer a 12-year manufacturer warranty and an additional 12 years of workmanship coverage. They are also Window Wise certified, providing additional consumer protection through SAWDAC.
• Energy Efficiency: GreenFox emphasizes energy efficiency through their window features, including low-E+ + argon gas, double neoprene bulb seals, and optional triple pane glass. Their focus on high-performance materials contributes to excellent insulation and reduced energy loss.
• Customer Service: GreenFox has a strong reputation for professional service and efficient timing, with many positive reviews highlighting their courteous and knowledgeable teams. Their "Full Coverage" warranty also speaks to their commitment to customer satisfaction and long-term support.

Lux Windows

LuxWindows is a multi-generational family business based in Calgary, known for crafting quality windows.

• Product Lines & Materials: Lux Windows offers a diverse selection of window styles and materials, including Aluminum Clad, LynX Hybrid (a Lux-exclusive hybrid series, likely combining materials like vinyl and aluminum), and PVC Windows. They provide various glass and glazing options, including dual and triple-pane, with different Low-E coatings for varying thermal performance. They also specialize in custom shapes, bay & bow, and corner windows. 
• Warranty: Lux Windows offers a 25-year warranty on insulated glass units (against seal failure) and PVC (vinyl) extrusions against material defects. They also provide a 25-year warranty on exterior metal extrusions against flaking, peeling, or blistering of the finish. Operating hardware is covered by a limited lifetime warranty. When installed by Lux Certified installers, they offer a 10-year installation warranty. Fiberglass doors have a 10-year warranty, and interior wood components have a 10-year warranty (with specific maintenance requirements).
• Energy Efficiency: Lux Windows provides detailed performance comparisons for their glass and glazing options, showcasing U-factors and R-values for dual and triple-pane configurations with various Low-E coatings. Their triple-pane options with advanced Low-E coatings demonstrate excellent thermal performance, with U-factors as low as 0.11 and R-values up to 9.09, indicating high energy efficiency.
• Customer Service: Lux Windows has a long-standing presence in the Calgary market and receives generally positive feedback for its product quality. While some customers have reported communication issues, their dedication to addressing concerns through direct contact with their service department is a positive sign.

Ecoline Windows

EcolineWindows is a prominent Canadian window company focusing on energy efficiency and a strong warranty.

• Product Lines & Materials: Ecoline Windows emphasizes high-performance vinyl (PVC) windows and doors, all built in Ontario, Canada. They offer both Energy Star triple pane and certified double-pane models. Key features include Low-E coatings to regulate heat transfer, Argon or Krypton gas fills between panes, and Super Spacer technology for enhanced sealing and insulation. Their PVC profiles are often thicker for increased durability.
• Warranty: Ecoline offers a comprehensive 25-year warranty on vinyl frames, seal failure, hardware, installation, and labour. They also provide a 5-year warranty on bug screens. This direct manufacturer warranty is a significant advantage, often surpassing typical "lifetime" warranties from competitors that may have more fine print.
• Energy Efficiency: Ecoline Windows places a high priority on energy efficiency. Their windows meet the latest NAFS-22 standard for superior performance and are designed to exceed industry standards for energy efficiency. They highlight meeting a minimum Energy Rating (ER) of 34 and reducing energy costs by 7-12%, with "Most Efficient" models offering up to 55% greater efficiency than standard windows. Their products are listed on the official ENERGY STAR database.
• Customer Service: Ecoline Windows aims for a simplified, full-service approach, from product consultation to installation and post-installation support. While some customer reviews indicate issues with project completion or deficiencies, Ecoline's public responses to these concerns show a commitment to investigation and resolution. Their 25-year warranty on installation and labour also suggests confidence in their service quality.

Conclusion

For Canadian homeowners navigating the window replacement market, understanding the strengths of each manufacturer is key.

Best Solutions CalgaryWindows stands out for its exceptional "Oops! Warranty" covering even glass breakage, its local, personalized service, and a strong commitment to quality installation. For those in the Calgary area prioritizing comprehensive protection and a hands-on approach, they are an excellent choice.

All Weather Windows offers a vast range of products and proven energy efficiency, backed by decades of industry experience. GreenFox Windows impresses with its robust "Full Coverage" warranty and focus on durable vinyl products. Lux Windows, a Calgary-based family business, provides a strong selection of materials and detailed performance data, particularly for their highly efficient glass options. Ecoline Windows is a strong contender with its comprehensive 25-year direct manufacturer warranty and dedication to energy-efficient PVC products.

Ultimately, the "best" company will depend on your specific needs, budget, and location. It's recommended to gather quotes from a few of these top contenders, thoroughly review their warranties, and consider their customer service reputation to make the most informed decision for your home in 2025.