GFRG Seamless™ Access Panels
Glass Fiber Reinforced Gypsum, Glass Fiber Reinforced Cement
Pop-Out, Round, Conceal Hinged Access Panels
We create seamless solutions.

GRG COLUMN COVERS

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Castle manufactures GRG (Glass Reinforced Gypsum) building components for the commercial, institutional and high-end residential building markets. We have the largest stock molds for standard column covers ranging from 8" to 60" diameter in heights as tall as 16 ft.

  • Short Lead-Times
  • Design and technical shop drawings
  • Free freight for qualified customers

In addition we have a complete mold shop which allows us to produce our products to suit your specific requirements. Please contact us with your specific needs for a quote 905-738-8089.

GRG Column Covers Installation

Non combustible and lightweight GRG column covers are typically installed with screws and adhesive. After attachment, the joints between the sections are taped and floated together to create a monolithic, seamless appearance. The column covers are then ready for paint or other finish options. Installation details are provided with the shop drawings.

section cut diagram
Legend
1 G.R.G. Field Tape
2 Built-In Plywood
3 Flange
4 Shim (by installer)
5 Structural Back-Up (by installer)
6 Countersunk Fasteners
7 Column height over 14' will be shipped in lenghts as specified by Castle
Diameter 12" 14" 16" 18" 20" 22" 24" 26" 28" 30" 32" 34" 36" 40" 42" 46" 48"
Height 12' - 0" 12' - 0" 12' - 0" 12' - 0" 14' - 0" 14' - 0" 12' - 0" 14' - 0" 17' - 0" 14' - 0" 14' - 0" 13' - 0" 13' - 0" 12' - 0" 13' - 0" 10' - 0" 8' - 0"
Diameter Height
12" 12' – 0"
14" 12' – 0"
16" 12' – 0"
18" 12' – 0"
20" 14' – 0"
22" 14' – 0"
24" 12' – 0"
26" 14' – 0"
28" 17' – 0"
30" 14' – 0"
32" 14' – 0"
34" 13' – 0"
36" 13' – 0"
40" 12' – 0"
42" 13' – 0"
46" 10' – 0"
48" 8' – 0"
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General Guidelines for GRG Column Cover Installation

  • GRG should be stored in an enclosed area and protected from weather
  • Fasteners are standard self tapping or self drilling drywall screws and drywall type adhesive such as PL 100
  • Joints in GRG column covers are finished similar to gypsum board in according to ASTM C-475 guidelines.
    Fiberglass tape is recommended
  • Column covers are typically made to length, but if cutting is required, a dry diamond saw blade or a fine toothed carbide tipped metal blade is recommended. As with all gypsum, fiberglass or construction materials avoid breathing the dust (See installation instructions)
  • When dry and dust free, prime and paint or finish the GRG column covers as desired
  • As with any gypsum product, GRG column covers that are to receive a semi gloss or gloss finishes will require additional preparation of the surface.