Chelmsford Plastic Warehouse holds in stock an extensive range of Keylite Windows and Flashing Kits. The Keylite window brand is now one of the market leaders in its sector. Windows are available in many different sizes and finishes. Our windows have a stylish design and are competitively priced. The Keylite window has been designed so that it’s as easy as possible to install. There are many optional extras available including remote control opening and integral blind system.