102mm Mullion: This multi-hollow section is 2mm narrower than the perimeter frame to match the 2mm internal frame radius. The centre web keeps the water on the outside of the weather line.

To soften the internal appearance, frame, mullion and transom have a 2mm internal corner radius.

102mm Transom: The heavy, multi-hollow transom is again 2mm narrower than the mullions to suit the 2mm mullion corner radius. This transom also suits winders and flyscreens.

40mm Transom: We also offer a narrow transom for those commercial projects that are looking for a flat internal surface.

Note: This 40mm transom does not accept winders or flyscreens.