Non-metallic building materials, namely, natural stone and stone tile, agalmatolite, amphibole, plastic webbing material used to reinforce bituminous waterproofing sheets, plastic pipe supports, semi-worked woods, cellular PVC trim, fly ash, pedestals, joist shoes, and railings; non-metallic rigid pipes for building; non-metallic transportable buildings; artificial wood, rocks or stone; building and construction materials and elements, not of metal, namely, plastic pipe supports, fiberglass p...