Window panes and tempered, wire plated, luminous glass for buildings; casement windows of fiberglass and plastic; fittings of plastic for windows; fittings of plastic for railings; fittings of plastic for panelling; installation of windows; installation of window systems for buildings; construction project management in the field of installation of windows; building construction services; installation of railings for buildings; installation of railing systems for buildings; project management services in the field of construction of railings for buildings; installation of panelling for buildings; installation of metal panelling systems for buildings; custom manufacture of windows and window systems; custom manufacturing of paneling systems for buildings; custom manufacturing of railing systems for buildings; designing and engineering window systems for buildings; designing and engineering railing systems for buildings; designing and engineering metal panelling systems for buildings