Metro GlassTech's high performance double glazing can reduce heat loss by up to 73%, and make for a warmer, drier, healthier home for you and your family. Double glazed windows will help keep generated heat inside, keeping your home at a more consistent temperature - cutting down your power costs. Double glazing is made from two pieces of glass sealed together with an air space in between. A double glazed window sits in your window frame just as regular single glazing would, but provides a number of extra benefits. Whether you are looking to keep your home warmer, quieter or reduce condensation, Metro GlassTech can recommend the best combination of glass types to meet your needs.