Ceiling boards of wood; Ceiling panels, not of metal; Ceramic tiles; Chemically treated wood, namely, wood beams, wood boards, wood joists, wood rafters, wood siding, wood tile floors and flooring, wood trim, wooden beams, wooden flooring, wooden railings, and wooden wainscoting, all of the above containing a fire retardant chemical; Construction materials, namely, non-metal bonding fasteners for mounting and demounting of ceiling and wall panels; Cork tiles and tiles of cork-based conglomerates being building materials for floors, walls and ceilings; Gypsum tiles; Non-metal ceiling panels; Non-metal ceiling tiles; Non-metal coverings for ceilings; Non-metal floor tiles; Non-metal suspended ceiling systems comprising panels; Non-metal tiles; Non-metal tiles for walls, floors or ceilings; Non-metal wall tiles; Synthetic flooring materials or wall-claddings; Tiles of ceramic for wall, floor or ceiling; Tiles of clay, glass, gypsum, ceramic or earthenware; Vinyl tiles; Wall panels not of metal; Waterproofing system comprised of non-metal wall system elements designed to prevent entry of moisture and to prevent growth of mold