19 Roofing slates; building timber; tile floorings, not of metal; nonmetallic transportable buildings; concrete building elements, namely, concrete building slabs; construction materials, namely, non metal piles; non-metallic roof panel composed of solar cells, namely, rooing, not of metal, incorporating solar cells; bricks; roofing, not of metal; nonmetal roofing hips; huts, namely, huts being non-metal structures for mounting solar panels; building panels, not of metal; window glass, other than vehicle window glass, namely, stained-glass windows; window glass for building; building materials of glass fiber reinforced plastics, namely, fiberglass faced panels; glass roofing tiles; window frames, not of metal; glass bricks; refractory construction materials, not of metal; roof coverings, not of metal; building glass; pantiles, not of metal; transportable buildings, not of metal; wall tiles, not of metal; wall claddings, not of metal, for building; fair huts, namely, huts being non-metal structures for mounting solar panels; telephone booths, not of metal; arbours used as structures, not of metal; building materials, not of metal, namely, rock crystal for use as building materials; tiles, not of metal, for building; roofing tiles, not of metal; flashing, not of metal, for building