Stacker doors consist of one fixed panel and two sliding panels of glass. The sliding panels of glass stack over each other and both slide to the same side (stacking over the fixed panel). This allows for a larger opening when compared to standard sliding doors and the design allows for a greater maximum width (of 4038mm wide). Again, this style of door is limited to two configurations:
SSF - Sliding from the left to the right when viewed from the outside, looking in.
FSS - Sliding from the right to the left when viewed from the outside, looking in.