Business Details
48 Years
experience
Trusted Window & Door Manufacturer in Ontario | Clera Windows
Clera Windows + Doors has been a trusted name in the Canadian window and door industry since 1978. As a family-owned and operated business, we have built a legacy of excellence through our commitment to quality, innovation, and customer satisfaction. Our team of certified technicians and factory-trained professionals ensures every product meets rigorous standards for durability, energy efficiency, and aesthetic appeal. With over 45 sales and installation offices across Ontario, we offer factory-direct pricing, eliminating middlemen to deliver exceptional value. Our lifetime warranty, ENERGY STAR certification, and A+ BBB rating underscore our dedication to trustworthiness and reliability.Recognized as Ontarios most awarded window company, we continue to innovate with advanced technologies like Low-E glass and argon gas insulation, tailored for Canadian climates. Our personalized approach ensures every homeowner receives customized solutions that enhance comfort, security, and property value. With 300,000+ satisfied customers, Clera Windows remains committed to supporting Canadian families and communities through superior craftsmanship and service.
Services
Casement Windows
Fixed Windows
Awning Windows
Slider Windows
Custom Doors
ENERGY STAR Products
Financing Options
Installation Services
Warranty Support
Design Consultations
Details
- Year established: 1978
Highlights and features
- We offer 45+ years of family-owned expertise in window and door manufacturing.
- Our factory-direct pricing eliminates middlemen for competitive rates.
- Lifetime non-prorated warranty covers all vinyl components and glass.
- Certified technicians ensure precise installation and superior service quality.
- Serving Ontario with 45+ branches for local accessibility and support.
Associations and certifications
- ENERGY STAR
- BBB A+
What people say
Knowledgeable salesperson
Amazing service
Friendly and professional
Happy with result
Excellent quality
Services
Casement Windows
Clera Windowss casement windows feature side hinges and outward-opening designs for optimal ventilation and energy efficiency. Crafted from 100% pure virgin uPVC, they resist warping and corrosion while incorporating multi-point locking systems for security. The ergonomic handles and triple-sealing technology ensure airtight performance, reducing energy costs. Customizable options include color, grille patterns, and glass types to match architectural styles.
Fixed Windows
Fixed windows provide unobstructed views and ample natural light without operable sashes. Clera Windowss models use wet-glaze sealing systems and Low-E glass with argon gas to enhance insulation. Their durable frames withstand extreme weather, and custom sizing ensures seamless integration into modern or traditional homes. Ideal for accent walls or spaces prioritizing aesthetics over ventilation.
Awning Windows
Awning windows pivot outward from the top, offering rain-resistant ventilation and enhanced security. Clera Windowss versions include durable vinyl frames, triple-fin weatherstripping, and optional grilles. They are ideal for basements, bathrooms, or areas requiring privacy while maintaining energy efficiency through advanced glazing technologies.
Slider Windows
Slider windows feature horizontally gliding sashes for easy operation and modern aesthetics. Clera Windowss designs incorporate easy-glide technology, built-in safety latches, and multi-chambered frames for thermal performance. Available in single or double-slider configurations, they maximize glass area while maintaining structural integrity in Canadian climates.
Custom Doors
Clera Windowss custom doors include steel, fiberglass, and storm options tailored to homeowner preferences. Features like reinforced hardware, energy-efficient cores, and customizable finishes ensure durability and curb appeal. The manufacturing process integrates galvanized steel for structural strength, while triple-sealing systems prevent air leakage, enhancing home comfort and security.
People
Steve Mastrorillo
Founder
Steve co-founded Clera Windows in 1978 as F&M Aluminum Manufacturing. His vision for quality and innovation laid the foundation for the companys transition to vinyl windows and direct-to-homeowner sales, establishing a legacy of family leadership.
Vito Mastrorillo
President
Vito, Steves son, rebranded the company to Clera Windows + Doors in 2010. He expanded manufacturing capabilities and introduced the ENERGY STAR-certified Clarity line, solidifying Clera Windowss reputation as Ontarios leading window provider.
Stefano Mastrorillo
Director of Strategy
Stefano, Vitos son, continues the family tradition by driving strategic growth and innovation. His focus on customer-centric solutions ensures Clera Windows maintains its commitment to quality and adaptability in a competitive market.
Questions
What are vinyl windows?
Vinyl windows are made from PVC, offering durability, low maintenance, and energy efficiency. Clera’s models use 100% pure virgin uPVC for longevity and resistance to fading or warping.
How long do vinyl windows last?
Clera’s vinyl windows last 20–30 years due to high-quality materials and a lifetime warranty. Proper installation and maintenance ensure decades of performance in Canadian climates.
How to measure for window replacement?
Measure the existing opening’s height, width, and depth. Clera’s experts assist with precise measurements to ensure a perfect fit for custom vinyl windows.
How to install vinyl windows?
Professional installation is recommended. Clera’s certified technicians remove old units, secure new windows, and seal gaps to ensure energy efficiency and structural integrity.
How to clean vinyl windows?
Use mild soap and water with a soft cloth. Avoid harsh chemicals. Clera’s tilt-in sashes simplify cleaning while maintaining airtight seals and durability.
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