Repair and installation services, namely, the installation of heating, cooling and environmental control systems primarily using solar energy, renewable energy resources and rainwater; Tile installation services; Clock installation services; Glass installation services; Drywall installation services; Window installation services; Plasterboard installation services; Office machinery installation services; Installation services of building scaffolds; Computer support services being installation, repair and maintenance of computer hardware and peripherals; Installation services for elevators and lifts; Plate glass installation and repair services; Installation services of elevators and lifts; Installation services of working and building platforms; Installation and repair services for irrigation systems; Assembly services relating to the installation of furniture; Advisory services relating to the installation of plumbing; Advisory services relating to the installation of lighting apparatus; Installation services of building scaffolds, working and building platforms