4261 Brickwork (165) Brickwork consisting generally of bricks laid in courses on a mortar bed to form veneers of cavity wall construction. Facing wythes 4262 Prefabricated brick panels (0) Prefabricated panels of bricks, without a concrete backing slab, held together with steel reinforcement and with all joints and interstices fully grouted or formed with adhesives, the panels fixed to the building structure usually as a veneer over a cavity 4263 Hollow concrete blockwork (1) Blockwork consisting of hollow concrete blocks laid in courses on a mortar bed to form veneers of cavity wall construction 4264 Solid concrete blockwork (1) Blockwork constructed of solid concrete or aerated autoclaved concrete blocks, laid in courses on a mortar bed to form veneers of cavity wall construction 4265 Fired-clay blockwork (1) Blockwork consisting of fired-clay blocks laid in courses on a mortar bed to form veneers of cavity wall construction 4266 Unfired earth masonry (0) Earth masonry consisting generally of unfired blocks and bricks, including pressed bricks, made of clay and other earth materials, with or without reinforcement and bituminous, plastics or cementitious binders, laid in courses to form veneer of cavity wall construction 4268 Miscellaneous Masonry Veneer Cladding (8) Masonry veneer cladding and related items of various types and materials