A rigid building board made from natural reeds laid parallel and tightly bound using thin gauge galvanised wire. It is suitable for internal use as a base for plastering on walls and ceilings. It can be used against a solid background or over studs or joists as a practical alternative lining material to gypsum plasterboard or laths. Reed boards are particularly suited to using with clay or lime plasters in building restoration and new-build. They can be used unfinished to create feature walls as an insulation board or to act as permanent formwork. They can be used externally in landscaping schemes to form natural partitions.