Yes! Double-glazing your windows and doors will improve your energy rating. You’ll drastically reduce heat loss in winter and heat gain in summer, through double-glazing. This will, of course, reduce your heating and cooling bills to improve your energy rating.

The big difference that double-glazing windows primarily give is stopping the transmission of heat from one side of the window to the other. This may not sound like much, but over time, the cost of inefficient insulation can jump, and trigger a series of hefty energy bills – bills that can be avoided by installing double-glazed windows.