Since 2001, GM Exteriors has been at the forefront of Ontario’s specialty siding and cladding industry, providing high-performance exterior solutions for industrial, commercial, institutional, and residential properties. As Ontario’s largest full-service specialty siding contractor, we work closely with architects, developers, property managers, and contractors to ensure energy efficiency, durability, and enhanced aesthetics in every project.
We specialize in full-scope siding and cladding systems—from initial consultation to final installation.
Our team sources premium products from industry-leading manufacturers for unmatched performance.
Every project is guided by experienced professionals who understand complex building requirements.
We prioritize code compliance, material integrity, and precision installation on every site.
Whether it’s a multi-phase commercial build or a custom residential façade, GM Exteriors delivers with confidence and consistency.
Our Industrial, Commercial, and Institutional (ICI) projects make up 60% of our work, while residential siding solutions account for 40%. We use premium materials sourced from top industry brands, offering:
We provide seamless project management, including:
With over two decades of experience, we continue to set the industry benchmark for excellence, combining cutting-edge techniques with precision craftsmanship to enhance the value and longevity of every structure.
We’re proud to work with developers, builders, architects, and property managers across Ontario. From large-scale commercial projects to custom residential builds—our clients trust us to deliver reliable, high-quality exterior solutions.
Mon–Fri: 7:00 AM – 5:00 PM
Sat–Sun: Closed
Submit the form below and one of our experts will get back to you shortly.
*We respect your privacy and will not share your information.
