Single-glazed windows in draughty panes cost you money.

Close your curtains at dusk to stop heat escaping through the windows.

Draughtproofing saves you approximately £20 per year on your energy bills.

If you don't already have double-glazing in your home, it's definitely worth thinking about. If you can't afford to replace all the windows, why not choose the rooms that cost you the most to heat? You could reduce heat loss through windows by half.

Double-glazed windows come in a variety of styles but it's worth checking any restrictions on your house due to age and location, especially in any Conservation Areas. Fitting double-glazing when your existing window frames need replacing will save you time and money.

Look for the energy saving recommended logo when choosing your windows you can be sure they are the most energy efficient, as the whole window (frame and glass) is assessed on a rating of A-G by the British Fenestration Ratings Council.

If you're on a budget, fitting secondary glazing could be the answer. It's less expensive than replacement double-glazing and will still save money by cutting heat loss and draughts.

Secondary glazing allows the originals to be retained and is generally accepted by planning authorities for use in listed buildings - which can be a problem with some of Thornbury's older houses.

The glazing can be found in a variety of styles - Vertical sliders for Sash Windows, with a tilting and removable sash facility for ease of cleaning, Horizontal sliders with removable sashes for 'picture' type casement windows, Hinged units for narrow casements, doors & French doors or windows.

Some sashes can be lifted off and you can get lift out units for use when you only occasionally need to get to the window.

You can also get cheap diy rolls of secondary glazing from most diy stores