There are many glass roof suppliers out there to choose from but one we reccomend is http://www.vitral.co.uk/en who do a great range of products for your kitchen extension. See below for further details:
SkyVision roof light is an attractive roof light window allowing a maximum of natural light in a timeless, clean aesthetic design. The heat loss is minimal and the noise reduction optimum. SkyVision is available in five types – SkyVision Fixed, SkyVision Comfort, SkyVision Circular, SkyVision Walk-On and SkyVision Ecoline. Each with special qualities for particular needs – and sizes according to customer specifications. The combination of a frameless design enabling maximum light penetration, high thermal insulation and air tightness makes for a truly unique product. Our modular double glazed flat roof lights (SkyVision Fixed and Comfort) are impact tested as standard to TN66/67 to protect those carrying out roof maintenance and cleaning.
Want to know more…contact firstname.lastname@example.org or 02081665145