Keystone Installations are a professional curtain wall installations company offering a complete contracting service for curtain wall installations. Recognised for their premium curtain wall installations, Keystone Installations install the curtain walls of some of the best Global and Australian aluminium curtain wall manufacturers.

The G.James Commercial Contracting Division is a world leader in the supply of glass and aluminium products for the high rise apartment, commercial tower and curtain wall construction markets. G.James has been the chosen supplier of aluminium windows, doors and external facades to many of Australia's landmark buildings.