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How double glazed windows are made

Although double glazing a common feature in most homes, it is not widely known how it came about, or the manufacturing process. Double glazed windows were first invented in America in the 1930s and gradually grew in popularity, and by the 1950s it was very common. It was known under the brand name of Thermopane and registered in 1941 by the Libby-Owens-Ford Glass Company.

The manufacturing process is actually fairly straightforward. First, the two panes of glass are separated by a spacer and a hermetically-sealed (airtight) gap is created. Then, it is filled under vacuum conditions with an inert gas such as argon. This prevents condensation from forming and stops moisture seeping in between the panes of glass.

The width of the cavity depends on the type of window and gas filling but it is generally between 10-20mm. For example, for Low E energy saving windows, the recommended cavity width when filled with argon gas is 20mm.

Triple glazing is made in the same way, except with three panels of glass and double-argon cavities. It throws radiated heat back into your home meaning you’ll stay warm and the draughts stays out.

Double glazing is a fantastic way to insulate your home, save on your energy bills and reducing noise. If you’re looking for that little bit extra, triple glazing provides even more heat efficiency, as well as additional security. In fact, we’re so confident about the security of our double and triple glazed windows, we offer a £1000 anti-intrusion guarantee.

Get a quote for your double or triple glazing

Get a free quote from our website, or call us FREE on 0800 50 50 70.  Alternatively head to one of the Britelite Windows showrooms located throughout the South East, in Maidstone, Crayford, Chessington or Westgate.

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