Our Bespoke timber windows are designed with a range of innovative design features that combine traditional aesthetics with modern technology. The below specification details are a minimum standard we look to achieve on our windows/doors. Any Bespoke profile of cill, frame thickness, finish and ironmongery options are available together with your choice of timber sash option. Traditional butt hinges and casement stays, or modern high security espagnolette locking systems are also available. To BS 644, Our glazed window/door designs are tested to BS6375 Part 1 Min whole product U value of 1.6 for windows & 1.8 for doors, They are designed to achieve minimum BS6375 Part 2 ratings of Air 600pa, - Watertightness 150pa - Wind-load 1200pa class 3 for outstanding weather resistance to cope with most British climate conditions.