Non-metallic building materials; building boards; panel boards; building paper, wallboards and wall panels; building sheets and linings; cladding materials; non-metallic jointing compounds for use in construction; jointing compounds for use with plasterboard; jointing products and preparations for plasterboard; consumables in this class for use with plasterboard or dry wall; filling or surface material in dry or pre mixed form; jointing tape for plasterboard; non-metallic jointing materials for use in building; non-metallic building materials in the form of tapes; parts, fittings and additives in this class for the foregoing