Glass Reinforced Gypsum (GRG, or alternatively known as GFRG, Glass Fiber Reinforced Gypsum) is a mix of plaster, chopped glass fibers and may be combined with other aggregates. This light, versatile construction material can be molded in a myriad of designs, shapes and textures in ceilings, column covers, decorative wall panels, domes and more. It is found within Division 9 Surfaces in architectural specifications. Above View incorporates chopped glass, while other manufacturers may use alternative types of glass, fiberglass sheets, or woven fabric. Historically other aggregates have included horsehair, straw and paper pulp.
Where Does GRG come from?
Formed over millions of years in sedimentary rock layers as large rocks or beautifully colored crystals, gypsum’s exaggerated natural shapes bring to mind Superman’s fortress of solitude. In the United States, most gypsum is mined in the southern and western states.
How is GRG manufactured?
The classic makeup of plaster is a mix of dehydrated gypsum, water and sometimes other hardeners or retardants, and it sets and hardens by chemical recombination of the gypsum with water. This produces a very hard material, and usually must be made on-site. The softer GRG mix includes those same ingredients, plus other chopped glass and aggregates for a lighter, more malleable composition. Typically, GRG panels are molded at a factory, then shipped to the building site.
What is the difference between GRG, GRP and GRC?
Each glass reinforced mix has its own unique quality and application. GRG is used for interior surfaces, with a crisp, light design that is easily cut. See it displayed as a dome, column casing, bulkhead or light cove. GRP (Glass Reinforced Plastic) is lightweight, high strength and has anti-corrosive properties suitable for pipelines, or can be used as an alternative to wood or steel and often seen in hammer handles. GRC (Glass Reinforced Concrete) is used for exterior building facade panels, but has also been applied indoors for countertops, fireplaces and artificial rock design.
Above View plaster and glass fiber tiles outlast inferior fiberboard, plastic or vinyl alternatives, and neither sag nor warp. Our proprietary process produces a high quality product with special attention to maintaining definition of details and integrity of design. All tiles have a UL Class A fire rating and are easily field cut for down lights, vents and sprinklers, without breakage.
