Cathedral Crafts Inc. offers full service frame design and installation in a variety of designs and finishes. We offer and install Sussman 6400 Series heavy aluminum triple glazed frames that house both the stained glass and the protective covering in the same frame. The exterior glass is a commercial grade insulated glass unit that is set in the thermal break of the frame. The stained glass is installed on the inside channel. Ventilation within the frame prevents heat buildup and condensation between the stained glass window and the insulated glass.