Non-metallic tiles, including ceramic and concrete based tiles; ridge cappings and ornamental fittings for use in roofing applications and materials for use in fixing and in joining and in sealing tiles, ridges and fittings; roofing, not of metal, incorporating solar cells; non-metallic building materials including matts, batts, rolls, faced or un-faced, having thermal and acoustic insulating properties, fire and humidity protection properties, for use in the construction of walls, partitions, ceilings, floors, roofs, cladding systems and under roofing systems; bricks; non-metallic building blocks; masonry blocks, works of stonemasonry; masonry structures; coatings being building materials for finishing or protecting masonry; pavers, not of metal; mortars; non-metallic roofing materials; roof coverings, not of metal; roof flashing, not of metal; non-metallic tiles including non-metallic wall, floor and roof tiles; non-metallic roof tiles including terracotta and concrete roof tiles; non-metallic guttering; non-metallic cladding elements for walls and roofs; timber and timber products; wood and wood products; composite beams, planks and trusses consisting primarily of non metallic materials for building and construction purposes; building timber, timber roof tile battens, structural timber and pre-finished timber flooring; non-metallic retaining wall systems comprising panels and their components; non-metallic building facade systems comprising panels and their components; concrete; concrete building panels; concrete cladding sheets; preformed building panels made of concrete; precast concrete panels for walling and flooring; fibre cement boards and panels for walling; non-metallic building materials being gutters, fascias, building panels, walling, roofing, lattice, fibre cement sheeting, cladding, roof sheeting, wall and roof interface panels, skylight panels, skylights, drainpipes, joists, beams, staircases, balustrades and parts and accessories for the aforementioned goods included in this class, all the foregoing being goods of non-metallic material; non-metallic transportable buildings; bituminous building products; concretes; structures not of metal including statues and bird baths; non-metallic fences, gates and letter boxes; non-metallic pavers and wall blocks; non-metallic water pipes; rigid pipes (not of metal)