UPVC windows, doors and conservatories improve the appearance and value of your home, making it warmer, safer and more secure. GRP Designs have been manufacturing and installing UPVC windows, doors & conservatories since 1988, and have several thousand satisfied customers. With over 80% of our work coming from recommendations, we believe that our windows are the finest in the region, whilst also offering the best value for money.www.grpdesigns.co.ukBritannia Rd, NN16 9RX

We formed Wittering West in 1986. Originally it was just the two of us. As skilled craftsmen we both started installing Conservatories for friends and family's. Our efforts to do a good quality job meant that more and more people wanted us to do work for them. Eventually we had so much demand that we decided to form Wittering West.www.witteringwest.co.uk32 Clarence Rd, NN16 8PF

WindoWoman is a Kettering, Midlands, based family business established by Sally Keech. After 9 years in the industry as a fitter, this girl decided to do it for herself! Double Glazing, and indeed any home improvements, can be an expensive and sometimess stressful experience. At WindoWoman, our mission is to make the process as simple and comfortable as possible at every stage.www.windowoman.com12 Weaver Cl, NN16 9NN

We specialise in the supply and installation of a range of high security doors, security doors and windows and conservatories in a variety of materials and finishes, at extremely affordable prices. We offer steel security doors, composite doors, upvc doors and a variety of wood doors including African Sepele hardwood doors and softwood security doors, all of which hold a 10 Year Insurance backed Guarantee. Areas serviced: Kettering, Northampton & Wellingboroughwww.homesecuritydoors.co.uk4 The Fairway, NN15 6GQ