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Glasroc Rigdur XXL boards from British Gypsum have been designed for the offsite manufacturing sector, where their full panel size format is claimed to offer significant benefits in terms of lining quality, panel stability, installation time and process and cost efficiency. The high density boards are made from gypsum reinforced with recylced paper fibre using a process that is said to give the board a high quality surface finish. The surface does not require any treatment before decoration, removing an operation from the offsite manufacturing process.