Lagging water tanks and pipes and insulating behind radiators reduces the amount of heat lost, so you spend less money heating water up, and hot water stays hotter for longer. Insulating your hot water cylinder is one of the easiest ways to save energy and, therefore, money.
If you already have a jacket fitted around your tank, check the thickness. It should be at least 80mm thick; if it isn’t, consider buying a new one.
Upgrading your hot water tank insulation from 25mm to 80mm thick, using a British Standard jacket, could save you around £20 a year, which is more than the cost of the jacket.
Slipping pipe insulation around your exposed hot water pipes will keep your hot water hotter for longer.
Insulation to pipes is easy if the pipes are accessible; if your pipes are hard to reach, you may need to engage a professional.