The intention here is to minimise the amount of heat that can escape through your walls - but it's not as nifty as it sounds.
"Even if tin foil was placed behind radiators installed on uninsulated cavity walls, the radiator will still need to be powered for the same period of time for it to have the desired effect."Turning water heaters off when not in use To help avoid these extra costs Dominick recommends that households invest in a hot water tank insulation jacket to keep their water hotter for longer.
Dominick said: "This myth is again based on half-truths – it is true that black and dark-coloured materials and objects absorb heat faster than white or lighter ones. Keeping your showers under four minutes can help slash your energy bills and bring down your water bills by £95 a year.