37 Installation, maintenance and repair of outdoor and external blinds, namely, blackout blinds, slatted blinds, venetian blinds, roller blinds, vertical blinds, window blinds, outdoor and external shutters, namely, roller shutters, rolling shutters, plantation shutters, louvre shutters, window shutters, security shutters, shutter doors and shutter grilles; restoration, installation, painting, repair and maintenance of roofing, namely, gutters and downpipes; construction consultancy and advisory services in the fields of the selection, installation, repair, painting and maintenance of roofing; installation, maintenance and repair of apparatus and systems for the provision of energy from renewable sources, namely, grid connected solar systems, solar cells, solar panels and electrical invertors; review of and remedial recommendations for the installation, maintenance and repair of solar energy equipment or systems