A & K Home Improvements was founded by Dave Adams and Chris Kettle, both fully qualified carpenters and joiners, in 1983. We're an independent company which means we are not tied to a single manufacturer and can offer the widest possible range of products.www.aandk.co.ukColchester Main Rd Alresford, CO7 8DB

ADVOCATE offer the complete solution for windows, doors, curtain walling & roof lights in aluminium, steel or PVCu. We work as Principal Contractor direct to Local Authorities, Health Authorities, Housing Associations & Government Departments or as a Subcontractor to Regional or National Contractors.www.advocateag.co.ukShipyard Est Brightlingsea, CO7 0AR

Having manufactured for a number of years under a franchise at our factory in Witham, Essex, making specialist windows and door products for most of the major companies in the industry. In 1996 it was decided to start First Choice to compete with the installation side of the business. The fitting teams are carefully screened, because at FIRST CHOICE the FITTERS are the end product, After all what's the point of have the right price and product if every thing else fails. Areas serviced: Chelmsford & Braintree, Colchesterwww.firstchoice-windows.comUnit 4/Moss Rd Stanway, CO3 0LE

Your home is the biggest single investment you'll ever make, and choosing replacement double-glazed windows and doors is a big step. After all, your new windows and doors won't just make your home more attractive and comfortable, they will also add to its value. Low-level beads and gaskets, which sit level with the frames, both inside and out, are less obtrusive than the standard option and enhance the overall finish of the windows.www.windoworldltd.co.uk11 Fulmar Close, CO4 3FJ