SENSE RANGE SmartSash - the real alternative There’s no getting away from it: the sash window is a real beauty. That combination of elegant style and through ventilation is a design classic that remains very popular to this day. But while we love sash windows for their grace and charm, old timber sashes can be a nightmare: cold and draughty, broken or seized mechanisms, or simply welded shut, with layer upon layer of paint. There is an alternative: one that combines the best of modern materials, security and insulation, with classic sash window styling. It’s a very smart alternative, which is why we call it SmartSash.