As the weather cools and winter sets in, many of us start to look for ways to keep our energy bills low and our homes warm. One of the best things to do is invest in double-glazed windows. Double-glazing is a process whereby two panes of glass are used instead of one, with air or gas-filled space between them. Double Glazed windows provide better insulation against cold and heat, meaning your home will stay at a comfortable temperature with far less energy. It offers several advantages over conventional windows.