About us

Castle Access Panels & Forms is North America’s premier manufacturer of GFRG Access Panels and cast products for interior use. Our capabilities and our repeat customers will testify as to the quality of our products, and on the service we provide.

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  • Timely detailed quotations
  • Standard and custom options
  • DWG/PDF drawing assistance to architects, designers and contractors
  • On-time manufacturing
  • In-stock
  • Custom Sizes, Pop-Out or Hinged


We specialize in:

  • GFRG Access Panels – Interior use
  • GFRC Access Panels – Exterior use
  • GRG Molded Shapes – Interior use
  • GRG Column Covers – Interior use
  • FRP Access Panels – Specialty exterior use


As a result of our commitment to research and development, we are able to offer the largest line of Pop-out & Hinged Radius or Square Corner GFRG Seamless Access Panels in standard sizes as well as custom sizes.

Why Castle

Leading Competitor Sample
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Castle Seamless™ Access Panels
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Product Features
  • Tapered edge for tape joint
  • Lightweight
  • No shrinking, craking, sagging or rusting
  • Concealed hinge
  • Moisture resistant
  • Easily textured
  • Single trade installation
  • Blends seamlessly into surrounding drywall
  • Reduce labor costs
  • Zero mold & fungus growth


Innovative Technology

Sustainability through innovation in GFRG & GFRC products

Our business is built on a strong foundation of providing you with innovative design and technology in all of our products, including GFRG Access Panels.

We are environmental leaders, and the first GFRG manufacturer to use post-consumer recycled materials –blue box glass in every product we make. Poraver® technology processes recycled consumer glass-including unusable coloured glass– by crushing it into a fine powder, refining it into lightweight pellets that expand and granulate which is used in the production of Castle Access Panels Pop-out and Hinged.

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In addition to doing the right thing for the environment, products enhanced with Poraver® are cost efficient, offer excellent performance, consistent quality, and meet or exceed all industry standards. They are non-toxic, non-combustible, mold-proof, odorless, chemically stable, unaffected by moisture, and free of any airborne silica. Plus, they provide excellent noise and heat insulation and have a high fire-resistance rating.

Some of our partners

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North West Wall & Ceiling Bureau Logo
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