Business Details
48 Years
experience
Your Trusted Partner for Premium Windows & Doors in Ontario
Clera Windows + Doors has been a trusted leader in the window and door industry since 1978, serving Canadian homeowners with premium, energy-efficient solutions. As a family-owned and operated business, we combine over 45 years of experience with a commitment to quality, offering custom-manufactured products designed to meet the unique needs of each client. Our team manages every project from design to installation, ensuring factory-direct pricing and exceptional service. With 300,000+ satisfied customers and a reputation for innovation, we prioritize durability, energy efficiency, and aesthetic appeal.Our products feature advanced technologies like Low-E glass and argon gas for superior performance in Canadian climates. Headquartered in Concord, Ontario, we operate 45+ sales and installation offices across the province, supported by certified technicians and a non-prorated lifetime warranty. Our dedication to excellence has earned us an A+ BBB rating and recognition as Ontarios most awarded window and door company. We pride ourselves on transparency, customer-centric service, and a legacy of supporting Canadian families through every project.
Services
Casement Windows
Awning Windows
Fixed Windows
Slider Windows
Storm Doors
Fiberglass Doors
Steel Doors
Custom Windows
Energy-Efficient Upgrades
Window Installation
Details
- Year established: 1978
Highlights and features
- We offer 45+ years of family-owned expertise in window and door manufacturing.
- Our products are 100% Canadian-made with energy-efficient, durable materials.
- We provide factory-direct pricing with no middleman markup.
- Our non-prorated lifetime warranty covers all hardware and components.
- Certified technicians ensure precise installation and exceptional service.
Associations and certifications
- ENERGY STAR
- BBB A+ Rating
What people say
Excellent service
Professional team
Energy-efficient upgrades
Lifetime warranty
Custom designs
Services
Casement Windows
Clera Windowss casement windows feature hinged sashes that open outward for maximum ventilation and unobstructed views. Crafted from 100% pure vinyl, they resist warping and fading while offering advanced energy efficiency through Low-E glass and argon gas. Ideal for hard-to-reach areas, these windows provide superior security with multi-point locking systems and seamless integration into modern or traditional home designs.
Awning Windows
Awning windows from Clera Windows combine durability and style with top-mounted hinges that create a rain-resistant canopy. Designed for privacy and ventilation, they feature ergonomic cranks and durable vinyl frames. These windows excel in basements or bathrooms, offering energy savings through triple-fin weatherstripping and Hydraglass 50 warm-edge technology to minimize heat loss in Canadian winters.
Fixed Windows
Fixed windows maximize natural light and panoramic views without operable sashes. Clera Windowss models use wet-glazed frames and Low-E glass to enhance insulation, reducing energy costs. Customizable in size and shape, they integrate seamlessly with other window styles, providing a sleek, modern aesthetic while maintaining structural integrity against wind and water infiltration.
Slider Windows
Clera Windowss slider windows offer smooth, horizontal operation with dual-pane glass for energy efficiency. Available in single- or double-slider configurations, they feature easy-glide technology and reinforced frames for security. These low-maintenance vinyl windows resist corrosion and are ideal for contemporary homes seeking unobstructed outdoor vistas and simplified ventilation.
Window Installation
Clera Windowss professional installation service ensures precise fitting of custom windows, backed by factory-trained technicians. We handle every step, from removal of old units to sealing and finishing, guaranteeing optimal performance. Our process includes energy audits, design consultations, and post-installation support, ensuring long-term satisfaction with a focus on minimizing disruptions to homeowners.
People
Steve Mastrorillo
Founder
Steve Mastrorillo founded Clera Windows in 1978, pioneering Canadian-made aluminum windows before transitioning to vinyl. His vision for quality and innovation laid the foundation for the companys growth into a family legacy.
Vito Mastrorillo
President
Vito Mastrorillo, Steves son, led Clera Windowss shift to direct-to-homeowner sales, enhancing customer relationships. Under his leadership, the company expanded its product line and earned industry recognition for excellence.
Stefano Mastrorillo
Director of Strategy
Stefano Mastrorillo, third-generation leader, drives Clera Windowss strategic growth, blending tradition with modern innovation. He focuses on sustainable manufacturing and expanding the companys ENERGY STAR-certified product range.
Questions
What are the benefits of vinyl windows?
Vinyl windows are durable, energy-efficient, and low-maintenance, resisting fading and warping while offering customizable styles and cost-effective solutions.
How long do Clera windows last?
Clera’s vinyl windows, made with 100% pure uPVC, typically last 20+ years with proper care, backed by a non-prorated lifetime warranty.
Do Clera windows meet energy efficiency standards?
All Clera windows are ENERGY STAR certified, featuring Low-E glass, argon gas, and warm-edge spacers to reduce energy costs in Canadian climates.
Can I customize window sizes and colors?
Yes, Clera offers custom sizes, colors, and grille options to match your home’s aesthetic, including specialty shapes and finishes.
What financing options are available?
Clera provides interest-free government loans, rebates, and flexible payment plans to make window replacements affordable for homeowners.
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