19 Artificial stone; Building materials, namely, concrete-based slabs made using recycled glass; Cement mortar slates; Clay roofing tiles; Concrete walls for building; Construction material, namely, fiberglass board; Construction materials, namely, underlays of agglomerated cork; Fired bricks; Fireproof cement coatings; Non-metal roofing tiles; Plastic reinforced wall panels for use as sound and light barriers; Unfired bricks; Wall claddings, not of metal, for building; Wall panels not of metal; Wooden veneers