Castle Access Panels & Forms Inc. is a North American manufacturer specializing in high-quality GFRG (glass fiber reinforced gypsum) access panels, column covers, and custom architectural cast products for interior construction applications. Founded in 2006 and headquartered in North York, Ontario, the company has grown from a small, family-run operation into a leading manufacturer serving architects, contractors, designers, and builders across North America.
Castle is best known for its SEAMLESS™ GFRG access panels, designed to blend invisibly into drywall surfaces while maintaining easy access for maintenance and building systems. The company offers more than 800 size and thickness combinations, including custom solutions tailored to project-specific requirements. Their products are widely used in commercial, hospitality, retail, institutional, and high-end residential projects.
In addition to access panels, Castle manufactures GRG column covers, molded gypsum shapes, and GFRC products for exterior use. The company emphasizes precision craftsmanship, innovative design, and efficient project support through in-house mold-making, design assistance, and custom packaging services. Their 45,000 sq. ft. manufacturing facility supports both small custom orders and large-scale production runs.
Castle also promotes sustainable manufacturing practices by incorporating Poraver® expanded glass beads made from recycled postconsumer glass into many of its products. This technology helps create lightweight, fire-resistant, moisture-resistant, and environmentally responsible building materials. With over 20 years of industry experience, Castle continues to focus on innovation, customer service, and delivering durable architectural solutions for modern construction projects.
