Frequently Asked Questions

Hertford Glass covers a wide geographical area such as Barnet, Basildon, Berkhamsted, Billericay, Bishop Stortford, Borehamwood, Braintree, Broxbourne, Buntingford, Chelmsford, Cheshunt, Chigwell, Chingford, Enfield, Epping, Hadham, Harlow, Harpenden, Harrow, Hemel Hempstead, Hertford, Hitchin, Hockley, Hoddesdon, Hornchurch, Knebworth, Leigh-On-Sea, Letchworth Loughton, Much Nazeing, Ongar, Pinner, Rayleigh, Romford, Roydon, Sawbridgeworth, Stanmore, Stevenage, Tring, Waltham Abbey, Ware, Watford, Welwyn Garden City, Wickford and all surrounding areas.


Double glazing reduces heat loss through the window by creating a barrier that slows down the transfer of heat. Heat can transfer through a window in several ways, including conduction, convection, and radiation. The two panes of glass and the air gap between them work together to reduce the amount of heat that is transferred through the window. This means double glazing helps to keep your home warmer in the winter and cooler in the summer, which can result in lower energy bills and increased comfort

We work with a range of providers to offer finance options that help you spread the cost of your replacement windows / doors. Full information around the loan and finance options can be found on our finance page.

Plain windows are a thing of the past, we offer a beautiful selection of 9 standard colours. UPVC can be customised with almost any RAL window colour of which there are over 1600. You can choose your favourite colour and create a bespoke coloured uPVC window or door.

Triple glazing is generally more efficient at reducing heat loss than double glazing, but it may not always be necessary or cost-effective. The exact energy savings achieved by triple glazing will depend on a variety of factors such as the climate, the orientation of the windows, the building's insulation, and the efficiency of the heating and cooling systems in your home.