Sri Lanka Institute of Architects. 2002, 2003, 2007 2010. Premium Roofing Architectural Stones Vinyl Timber Planks. Pebble Mosaics. Download Technical Data Sheet. Ridge Flexi Gaurd. With the Colourcon Ridge Flexi Guard™, you can finally own a leak free, hassle free home while retaining the beauty that only tile roofs can give you. The Ridge Flexi Guard is a synthetic .