Sym-Wall® is produced from a waste material known as “Flue Gas De-sulphurization (FGD) gypsum" the result of scrubbing environmentally damaging gas emissions from coal-fired power stations. This materiel is diverted from landfill to be used in the production of Sym-Wall® and as a recycled product has a low carbon footprint (embodied energy) at the point of use. It is benign and importantly offers higher purity and strength than natural gypsum.