Keylite Roof Windows Limited offers a large range of roof windows, skylights, rooflights and accessories, developed and produced at Group Head Quarters in Cookstown. The Keylite range is supplied with Keystone's excellent customer service, which is renowned in the construction industry.

Keylite's Technical Design Team carry-out ongoing R & D, which ensures that the highest standards of Quality and Service are maintained and that the product range is extended and enhanced on a continuous basis.