The Easifold range of folding sliding doors, which already features a bespoke freeglide running system, now also features an industry leading U-value of 1.32, outperforming the Part L 2010 requirement of 1.7, Origin claims The free-glide running system designed by the UK manufacturer uses nearfrictionless, maintenance-free needle roller bearings encased in tough nylon and concealed within the bottom track to …