19 Building materials, namely, non-metal countertops for further installation; Building panels, not of metal; Construction materials, namely, non-metal piles; Flashing, not of metal, for building; Laths, not of metal; Refractory furnace linings, not of metal; Reinforcing materials, not of metal, for building; Roofing boards; Roofing, not of metal, incorporating photovoltaic cells; Roofing, not of metal, incorporating solar cells