2. DOUBLE GLAZING Windows in older houses consist of a single pane of glass. The greater the area of the window, the faster energy passes through it by conduction. Energy loss through the windows can be reduced by about 50% by installing double glazing-2 panes of glass with an air gap between them. Some modern types of glass are also claimed to reduce energy loss by radiation. This is because they have reflecting surfaces. www.windowstoday.co.uk/

4. LOFT INSULATION. Heat escapes through the upstairs ceiling of the house by conduction. Loft insulation, placed directly above the ceiling, helps reduce the rate at which energy is transferred by conduction. Loft insulation is the cheapest form of insulation to include in your home.