The S140 has been designed in conjunction with AluK’s team in Italy so has all the sleek, minimalist flair you would expect, as well as clever UK engineering which delivers a compact 140mm frame depth and effortlessly smooth, double or triple track frame options. The new door offers plenty of flexibility and can accommodate double or triple glazed units depending on the thermal performance required and, where acoustics are a priority, has plenty of capacity for the larger glass thicknesses.