Find out why you should choose DIY Double Glaze to upgrade your existing timber windows with high-performance double glazing to reduce heat loss by 75%. If you have timber window frames or doors in decent condition, you don't need to replace them to achieve the full benefits of double glazing - simply replace the glass. Retain the character of your home, at 1/3 the price of replacing the window frames. DIY Double Glaze has been enhancing home comfort and sustainability in Melbourne for over 12 years, installing energy-efficient double-glazed windows that reduce energy bills, warm homes in winter, and cool them in summer.