The window industry prides itself on innovation at all levels. Bison Frames’ Genesis Vertical Slider is the perfect example of innovation on a scale that has the power to completely transform its sector. Mark Tetley of Bison says, “We wanted to create a vertical slider that offered something genuinely different and could enhance any home with its truly authentic looks. Our research forced us to look at everything about a typical PVC-u vertical slider in a new light and we started from the ground up in terms of design. The result is a window that can be – and has.