Using the Façade TB50 curtain wall system as its support grid and with no need for capping to retain the glass in place, the Façade TB50 SG system produces a flush finish to the exterior face of the facade. The glass is secured in place using toggles, which are placed into channels, these form part of the central seal of the double glazed units. All joints are weathered using a silicone seal producing a flush non-interrupted surface of glass -to- glass butt joints. Fritting of the edges of the double glazed units is not required when a black spacer bar along with a special Dow Corning edge seal edge is used. The double glazed units are manufactured in Ireland ensuring short lead times.