Abstract: A glazing assembly for the exterior of a building comprises glazing structures each having rigid channel forming members bonded about its perimeter. The channels so formed are oriented open to the periphery of the structure. Pressure plates are inserted in the channels of the glazing structures, and are fastened to structural members of the building by mechanical means such as screws. Each pressure plate coacts with a channel member and preferably with channel members of adjacent glazing structures to mechanically secure the structures in place on the building without the appearance of external frame members. The resulting assembly provides continuous glazing for the exterior walls of the building.