Acoustic building materials (other than for insulation); Building blocks incorporating insulating materials; Building components of imitation wood; Building components of wood; Building elements made of concrete; Building materials consisting of glass; Building sand; Building stone; Building timber; Non-metallic building blocks; Acoustic blocks; Blocks made from natural stone; Blocks made of concrete; Blocks made of concrete for coastal protection; Cement blocks; Concrete blocks; Concrete flooring blocks; Concrete paving blocks; Masonry blocks; Non-metallic flooring blocks; Paving blocks made of non-metallic materials