Fibrous plasterwork in its traditional form, is a build up of class A casting plaster, jute or hessian scrim, and timber lath; The casting plaster acts as the former / binding aggregate, the scrim prevents cracking, and the timber lath provides a fixing point, to facilitate two forms of fixing; adhesive and mechanical.

Fibrous casts are put into reverse moulds which can be stock moulds, or bespoke for matching work. The build up of these reverse moulds can be plain members or ornamental enrichments. The modern equivalent of fibrous plasterwork is glass reinforced gypsum (GRG) made from harder casting plaster and reinforced with glass fibre sheet or strands to form the shapes  that inovative design requires, such as lighting troughs, domes, and sweeping curves.

External the techniques of fibrous plastering can be extended into glass reinforced concrete (GRG), and products such as jesmonite, which can be colour finished to achieve matches in externally facades where original materials are no longer available, or something unique is to be created.