19 Non metallic building materials and structural components, namely, module frames, mounting systems consisting of slats, end caps, countertops, soffits, fascia, flashing, plastic panels, mounting rails, rail splices, spacers, mouldings for use in building construction, non-metal bonding fasteners for mounting of ceiling, wall and roof panels consisting of roof hooks, clips, clamps, bolts and nuts, anti-slip brackets for photovoltaic, solar thermal and solar installations; non-metallic building materials and structural components, namely, encapsulant frames, flashings and plastic panels containing solar cells, solar modules and solar collectors; roofing, not of metal, incorporating solar cells, solar modules and solar collectors; non-metallic rigid pipes, namely gutter pipes, water pipes, sewer pipes, polyethylene pipes, pipes of polypropylene, for use with photovoltaic, solar thermal and solar installations; non-metallic fasteners for photovoltaic, solar thermal and solar installations; glass for building