Perfect for any homeowner looking for a luxury window system, timber alternative windows are beautifully designed to replicate 19th-century flush sash timber windows. Because of their classic design, they are ideal for use in period properties and conservation areas, but they also make a smart addition to any contemporary home. These bespoke UPVC period flush sash windows are hand-crafted in the UK to exacting standards, creating a unique combination of gorgeous period detailing, trouble-free maintenance and excellent energy efficiency.