Evolution has carved a position for itself as true pioneers in the design and manufacture of traditional, timber replica windows and doors. Innovation and customer feedback has informed every step of our journey and through this relentless passion for detail we have developed our unique corner joint. Available across the Evolution Collection, the patented timber-look joint has been designed to allow all sashes to closely replicate the classic joinery methods used in the production of traditional windows. Timber-look corner joints are the epitome of elegance produce a truly authentic and beautiful window frame. This unique joint has all the beauty of natural timber, but all the strength of a modern weld. All the style of timber without any of the compromise.