I once worked on a hotel project in Canada where three sets of casement windows arrived late and didn’t fit the frame. We lost two days, and the crew had to redo the measurements on-site.
That experience taught me how much a good window supplier matters, especially one who delivers on time and gets the specs right.
So, I started keeping track. I now speak with engineers, review supplier records, and follow up on project results. I also contact manufacturers directly to see how they handle custom specs, bulk orders, and delays.
In this article, you’ll get a list of seven Canadian casement window makers that know how to support business buyers. You’ll find what they offer, where they stand out, and what type of project they fit best.
If you’ve had window issues that cost you time or money, this review will help.
So, let’s get started!
Quick Comparison
Before you dive into the full breakdown, take a minute to scan this. You’ll get a feel for who offers what, and where each one stands out:
| Manufacturer | Location | Founded | Product Highlights | R&D Focus | Best For | Not Ideal For |
| Clera Windows + Doors | Concord, Ontario | 1978 | Custom sizes, doors | Energy rating, in-house QC | Ontario builders | Nationwide projects |
| Kento Windows & Doors | Newfoundland & Labrador | 1983 | Coastal vinyl, patio | Weather tests, local input | Atlantic builds | Out-of-province buyers |
| Casa Bella Windows | Mississauga, Ontario | 1960s | Architectural windows, grilles | Warm edge, in-house crews | Stylish thermal projects | Distant project sites |
| Window Mart | Edmonton, Alberta | 2013 | Shaped glass, thermal doors | Thick glass, welded frames | Multi-province installs | Custom contractor use |
| Window City Industries | Vaughan, Ontario | 1992 | Bay, bow, accents | Robotic lines, PVC mix | Large-scale builds | Niche custom designs |
| Kohltech Windows | Ontario, Canada | 1982 | Tilt-turn, Passive-certified | Digital tools, glazing tech | Energy-heavy specs | Complex architecture |
| JELD-WEN of Canada | Across Canada | 1990 | Hybrid casements, panel doors | Robotics, eco materials | High-volume, repeat orders | Small batch needs |
Let’s move on to the full breakdowns, this is where you’ll really get the details that matter.
1. Clera Windows+Doors
Clera Windows + Doors has been in business since 1978, with its head office and manufacturing based in Concord, Ontario. It’s a family-run company, and I’ve found that they truly focus on working with local property owners and builders.
They manufacture their own windows and doors, so you’re not dealing with middlemen. This means more control over timing and product quality. They also operate over 45 local offices across Ontario, which is rare even for bigger brands. Though not BBB-accredited, they hold an A+ rating, and their long track record speaks for itself.
Product
- Vinyl Casement Windows: Their energy-efficient vinyl windows are built for Canadian weather and come in double or triple pane options.
- Custom Sizes and Styles: They manufacture to order, allowing you to match unusual or legacy openings.
- Integrated Screens: Many of their casement models include removable screens, which saves sourcing time.
- Hardware Options: Multiple lock and crank handle styles are available, giving flexibility for commercial preferences.
- Matching Entry Doors: They produce matching vinyl and steel doors that work well for coordinated exterior builds.
Research and Development
- Energy Efficiency Focus: Clera products meet or exceed Energy Star standards and often help clients improve project ratings.
- Durability Testing: Their windows are tested for weather resistance, impact, and performance in all Ontario seasons.
- Advanced Glass Options: Most units come with Low-E and argon-filled glass to improve insulation and reduce condensation.
- In-House Design Team: They control all designs from within the company, which helps avoid outsourcing delays.
- Finish Options: Multiple standard and custom color finishes allow better design alignment with building facades.
Contact Information
- Website:clerawindows.com
- Location: Concord, Ontario
- Phone: 1-844-738-7362
- Email: info@clerawindows.com
Takeaways
Clera Windows + Doors is best for builders in Ontario looking for locally manufactured casement windows with full installation support and strong regional reach. But if your business operates outside Ontario or needs nationwide fulfillment, you may need a second supplier to handle coverage gaps.
2. Kento Windows and Doors
Kento Windows & Doors began in 1983 and is fully owned in Newfoundland & Labrador. I’ve seen how they stand out when you need windows built for Atlantic weather. They serve commercial clients like hotels and churches, not just homes.
They operate two locations, one in St. John’s and another in Springdale, NL, both with manufacturing facilities. You’ll work through local dealers across the province when you order from them. They focus entirely on Atlantic Canada, so your service feels grounded and familiar.
Product
- Security Door Options: They offer steel and fiberglass security doors with multi-point locks, ideal for commercial safety needs. They match their vinyl window lines for a unified look.
- Vinyl Casement Windows: These windows handle harsh coastal conditions and offer Low-E glazing to meet efficiency codes.
- Awning and Slider Options: Available for projects that need flexible ventilation or design layouts. Good for large builds with mixed styles.
- Decorative Entrance Doors: Choose from heritage or modern styles with glass panels and finishes. These help enhance curb appeal while keeping function strong.
- Solid Vinyl Patio Doors: Launched in 2019, these large doors match Kento’s window styles and carry the same warranty. Great for hotel entries or shared spaces.
Research and Development
- Weather-Proof Design: Kento tests components to resist wind, cold, and moisture typical in Atlantic Canada. They meet rigorous performance thresholds for coastal use.
- Long-Term Glazing Warrant: Units made after March 17, 2017 have up to a 30-year sealed glass warranty, which shows confidence in their seal systems.
- Local Material Sourcing: They source many components locally, helping maintain consistency and reduce delivery issues.
- Dealer Feedback Loop: Kento listens to reports from dealers and installers and uses that to improve future product batches.
- Hardware Durability: They use stainless steel hinges and multi-point locks to reduce rust and wear in seaside locations.
Contact Information
- Website: https://www.kentonl.ca/
- Location: St. John’s & Springdale, Newfoundland & Labrador
- Phone: 709‑834‑8133 | Toll-free 1‑800‑563‑8887
- Email: info@kentowindows.com
Takeaways
Kento works well for businesses in Atlantic Canada needing reliable casement windows and security doors that resist harsh weather. You’ll get local dealer support and long glass warranties on larger orders. But lead times may vary depending on production schedules and seasonal demand.
3. Casa Bella Windows & Doors
I’ve worked with builders in Ontario who rely on Casa Bella when a project demands consistent quality and factory-backed support. They’re based in Mississauga and have been around for more than 60 years, which says a lot in this industry. Being part of the Alpa Lumber Group gives them extra backing to handle larger-scale jobs.
They design, manufacture, and install everything themselves. No third parties are involved. That kind of control helps avoid surprises on-site and keeps your timeline tighter. From what I’ve seen, they’re especially strong in projects that need thermal performance and finish consistency across units.
Product
- Vinyl Casement Windows: Energy-rated and designed to hold up through Canadian winters with tight seals and advanced glazing.
- Security Doors: Offered in steel and fiberglass, with multi-point locking systems built into their decorative and classic entry lines.
- Sliding Patio & Garden Doors: Ideal for projects with outdoor-facing units or shared patios, combining airflow and energy performance.
- Architectural Window Series: Higher-end line made for upscale builds that need both aesthetics and long-term durability.
- Decorative Doorlites and Grilles: Great for B&Bs or boutique hotels wanting a signature look while staying energy compliant.
Research and Development
- Warm Edge Spacer Technology: Helps reduce condensation and thermal transfer, which keeps interior temps stable.
- On-Site Product Testing: Everything is tested at their own Mississauga facility, helping shorten development time and boost consistency.
- Detailed QC Checks: From raw materials to final inspection, their system catches issues before delivery.
- Energy Star Compliance: Their full product line meets the latest performance codes for commercial-grade use.
- Trained Install Crews: Teams are trained in-house, which helps reduce errors during installation and improves long-term window performance.
Contact Information
- Website: https://casabellawindows.ca/
- Location: Mississauga, Ontario
- Phone: 416‑650‑1033 (Toll‑Free 1‑800‑407‑9917)
- Email:info@casabellawindows.ca
Takeaways
Casa Bella works well if you’re handling a project that needs strong visual appeal and certified thermal efficiency in one package. Their hands-on service and long-term reliability make them a practical choice, but they may not be the best fit if your site is far from Ontario and needs fast, wide-range delivery.
4. Window Mart
Window Mart Inc. was founded in 2013 and is based in Edmonton, Alberta, with service extending to British Columbia, Saskatchewan, and Ontario. The company focuses on vinyl window and door solutions for both residential and commercial builds. From what I’ve seen, they’ve grown quickly due to their well-trained installation teams and direct-to-client service model.
They manage quoting, delivery, and installation under one roof, which makes things easier if you’re running multiple units or sites. Their teams are WCB-insured and follow a standardized process that reduces rework. For business buyers, this often means less back-and-forth and faster completions.
Product
- Vinyl Casement Windows: These windows feature multi-chambered frames and triple-glazing options, built for energy savings and long-term use.
- Security Doors: Offered in steel and fiberglass with strong hardware, these doors match their window systems and meet commercial safety standards.
- Patio and Garden Doors: Designed with smooth operation and thermal-rated glass inserts to suit shared spaces or exterior access points.
- Glass Inserts & Window Grilles: Customizable styles available for both doors and windows, adding visual impact and security upgrades.
- Fixed and Shaped Windows: These are great for adding natural light in non-opening areas, made with insulated glazing and matching frames.
Research and Development
- Thick Sealed Glass Units: Their windows include sealed glass up to 13/16″ thick, helping reduce heat transfer and outside noise.
- Corner-Welded Frames: Frame corners are fusion-welded to keep air and moisture from seeping in over time.
- Insulated Multi-Chamber Frames: The multi-hollow design in each profile improves both energy efficiency and structural rigidity.
- In-House Test Procedures: While not lab-based, their performance tests focus on pressure, leakage, and glass seal durability.
- Training for Install Crews: They train all crews internally, which improves consistency and keeps installs within spec.
Contact Information
- Website: https://windowmart.ca/casement-windows/
- Location: Edmonton, Alberta
- Phone: 1‑855‑993‑0303
- Email:info@windowmart.ca
Takeaways
Window Mart is a smart choice if you need one supplier to handle both products and install across several provinces. Just note that they rely heavily on internal crews, so if you prefer working with your own contractors, integration might require extra coordination.
5. Window City Industries
Window City Industries has been manufacturing windows and doors since 1992 and operates out of a 400,000 sq ft facility in Vaughan, Ontario. I came across their operation while helping a builder source bulk window packages for a multi-phase residential project. Their capacity and direct control over every step from vinyl extrusion to delivery made the whole process easier for the team.
They’re still family-owned after four generations, which shows how they handle relationships with repeat buyers. If you’re running large or ongoing projects, their internal systems give you dependable timelines and strong product consistency.
Product
- Fixed and Casement Windows: Custom-sized, vinyl-frame windows built for long-term thermal performance using argon-filled glazing.
- Security Doors: Multi-point locking steel and fiberglass doors that come in standard and custom sizes, color-matched to window systems.
- Sliding Patio Doors: Energy-rated and easy to operate, these doors come with tempered or laminated safety glass for commercial use.
- Bay and Bow Windows: Adds architectural character while maintaining insulation standards, ideal for front-facing elevations.
- Decorative Glass & Entry Accents: Offered in various styles to elevate front entrances while maintaining privacy and impact resistance.
Research and Development
- Custom PVC Formulation: Their vinyl compounds are developed in-house and exceed durability standards for structure and insulation.
- Robotic Manufacturing Lines: Welds, seals, and assembly are done with automation to reduce manual error across product lines.
- 4SG Spacer System: Flexible warm-edge spacer reduces condensation and holds insulating gas longer than traditional systems.
- Color-Bond Finish Process: Color is bonded into the vinyl during extrusion, which minimizes fading and peeling over time.
- Barcode Tracking: Each product is tagged and tracked through production, giving you transparency from order to shipment.
Contact Information
- Website: windowcity.com
- Location: Vaughan, Ontario
- Phone: 905‑265‑9975 | Toll‑Free 1‑800‑382‑5020
- Email: info@windowcity.com
Takeaways
Window City works especially well if you’re managing large-volume builds and want consistent, in-house manufacturing from start to finish. Their scale and technology offer real advantages, but if your project needs one-on-one design input or small-batch specialty windows, their process might feel a bit too structured.
6. Kohltech Windows & Entrance Systems
Kohltech Windows & Entrance Systems has been in business since 1982, with manufacturing facilities in Nova Scotia, Ontario, and Alberta. I’ve heard from several builders that they turn to Kohltech when energy efficiency is a non-negotiable part of the spec. Their consistency and technical support tend to make the planning stage easier, especially on larger projects.
They’re one of the few Canadian manufacturers with Passive House certification for both windows and entrance systems. That’s useful if your builds require airtight performance and verified ratings. With national reach and detailed product tracking, they’re able to support a range of commercial and residential needs.
Product
- Tilt & Turn Casement Windows: European-style windows with dual-opening functions, ideal for high-traffic areas or builds needing flexibility.
- Security Door Options: Made from steel or cellular PVC, these come with reinforced frames and multi-point locking systems.
- Architectural Fixed Windows: Non-operable, large-pane options that provide visual impact without compromising energy performance.
- Awning & Double-Hung Windows: Reliable ventilation choices that pair well with both modern and traditional designs.
- Decorative Doorlites & Grilles: Various options available to enhance entries without sacrificing insulation or strength.
Research and Development
- Passive House Certified Products: Their casement windows and entrance doors meet international energy-efficiency standards.
- ISO-Driven Quality Systems: Production is managed under strict guidelines for consistent product output.
- Versatile Glass Options: Includes triple glazing, Low-E, and solar control options to match regional climate demands.
- Color-Bonded Finishes: Long-wear exterior colors designed to resist fading and peeling for 10+ years.
- Digital Configuration Tools: Helps you order exactly what you need, reducing mistakes and miscommunication on custom specs.
Contact Information
- Website: kohltech.com
- Location: Ontario, Canada
- Phone: 1‑800‑379‑5818
- Email: service@kohltech.com
Takeaways
Kohltech is a solid match if your build calls for high-efficiency certification and consistent technical reliability. While they cover a lot of ground with performance and support, their production model may not be ideal for projects focused on custom design statements or heavy architectural detailing.
7. JELD-WEN of Canada
JELD‑WEN of Canada started operations in 1990 and now runs major manufacturing facilities in Mississauga, Winnipeg, Moncton, and St. Henri. They’re part of the global JELD‑WEN brand, but their Canadian branch focuses on local production and support.
What impressed me most was how their operations balance national scale with reliable local delivery. They’ve earned recognition for energy efficiency and continue to invest in automated production to keep pace with demand.
Product
- Vinyl and Hybrid Casement Windows: Combines energy savings with flexible framing options, ideal for large commercial builds or residential developments.
- Security Doors: Strong steel and fiberglass designs with upgraded locking systems for secure, high-traffic entries.
- Sliding Patio Doors: Insulated glass with smooth-glide operation, great for hotel patios or residential multi-units.
- Wood and Molded Panel Doors: Offers interior and exterior doors with various core types, finishes, and impact ratings.
- Architectural Window Systems: Includes fixed windows, specialty shapes, and full wall assemblies for custom applications.
Research and Development
- Award-Winning Efficiency Standards: Their recent ENERGY STAR recognition reflects their focus on climate-ready window and door design.
- Automation in Manufacturing: Plants have been upgraded with robotic systems to improve lead times and reduce manual error.
- Broad Material Options: They produce vinyl, wood, aluminum, and hybrid units to support a wide range of building specs.
- Environmental Initiatives: Actively reduce waste and use sustainable practices throughout the production cycle.
- Project Design Support: Their dealer network and internal tech teams help translate specs into workable orders for builders.
Contact Information
- Website: https://www.jeld-wen.ca/en-ca
- Location: Mississauga, Ontario (plants in Winnipeg, Moncton, and St. Henri)
- Phone: 1‑800‑440‑2714
Takeaways
JELD‑WEN of Canada works well for multi-location or high-volume projects that require dependable distribution and product consistency. Their wide catalog and advanced production make them efficient, but if you need niche detailing or custom finishes, timelines might stretch depending on the request.
Looking for a Manufacturer Outside Canada?
Still unsure after going through all seven? Maybe the timelines feel tight. Or you’re not seeing the materials you need.
That’s okay. Not every supplier fits every build.
Canadian manufacturers are solid, but what if you’re open to exploring beyond Canada?
Here’s where Vallisco comes in. We’re based in China and work with buyers like you who need:
- Customize Your Specs: We adjust sizes, finishes, and features to match your exact build. No need to force standard options into non-standard projects.
- Lower Your MOQ: You don’t have to commit to large orders. We work in smaller quantities to match your project stage.
- Talk Without Delays: Our team communicates across time zones daily. You’ll get fast, clear updates, no chasing required.
You’ve done your local research. That matters. Now, it might be time to explore new ground.
Let’s find out if we’re a good fit for your project. Contact us today!
Conclusion
I once spent a full week finalizing window specs, only to learn the supplier couldn’t meet our delivery schedule.
That’s exactly why I created this list.
These seven Canadian manufacturers give you a solid place to start. Whether you’re building villas, hotels, or residential units, there’s a match worth considering.
But if Canada still doesn’t meet all your needs, Vallisco might be a better fit. We’re based in China and support teams like yours with flexible specs and smooth coordination.
Contact us today. We’d be glad to help!
