Profile: T.A.Colbourne Limited specializes in building envelopes. We are an ISO 9001:2008 certified company. Our services include site assembled roof & wall systems, composite roof & architectural wall panels, roof safety equipments, acoustic louvers, rain screen systems, rendered panels and standing seam aluminum roofing systems. Our rain screen system is a form of double wall construction that uses an outer layer, often decorative, to keep out the rain and an inner layer to provide thermal insulation, prevent air leakage and carry wind loading.