Construction materials, namely, concrete slabs designed to increase energy efficiency and energy conservation; Ducts, not of metal, for ventilating and air-conditioning installations; Fireproof cement coatings; Insulating glass for windows for building purposes; Magnesium oxide based sheet board for building purposes; Non-metal building materials, namely, fiberglass panels; Non-metal building materials, namely, floor boards; Non-metal building materials, namely, fascia; Non-metal ventilating ducts; Nonmetal door parts for buildings, namely, adjusters for adjusting the height of a door, floor boards, columns, beams, paneling boards, sills, sleepers, backings for ceilings or walls, stiles, rails and ceiling boards; Panelized homes, not of metal; Pre-fabricated non-metal homes; Staircases, not of metal; Stucco in the nature of decorative concrete overlays; Wall and floor art made of natural stone and stone tile; Window frames, sashes and casements of wood clad in aluminum