Sliding Door & WindowEnter the opening and pick the system. Get every shutter and glass size, the clear opening, the glass weight on the rollers and the pocket wall you need. Slide it open to see it work.

Interlock: how much neighbouring shutters overlap where they meet (25–50 mm on most aluminium and uPVC systems). Height deduction: track and roller allowance between the inner frame and the shutter. Glass bite into the stile is taken as 10 mm.