Longevity of Triple Glazing

Triple glazing is being heralded as the future of glazed windows; all newly built houses in the near future are expected to have triple glazing. The benefits of triple glazing are what have led building companies and architects to upgrade from double glazing. The extra benefits also come with a higher price which is something that anyone looking to buy triple glazing will have to take into account; there are also the other things to consider when making the large investment, quality, design and the longevity of triple glazing are all important.

Triple glazing

Triple glazing is similar to double glazing in make-up the only real visual difference is the extra sheet of glass. Double glazing is made up with one sheet of glass on the inside, a space and then the second sheet of glass on the outside; triple glazing is basically the same only with an extra gap and an extra space. Where the two differ dramatically is in performance and benefits. Triple glazing is designed to be more energy efficient than double glazing and dramatically reduce heat loss and the coating of the glass and the extra space allows it to do this. The space known as an air gap and is filled with an inert gas which provides insulation; the kind of inert gas used will also play a part in the longevity of triple glazing and the two gases used are either argon or krypton.  The glass used is known as low emissivity glass (low E) and is designed to enhance solar gain which allows sun light in to a room to provide free heat without affecting vision.


Longevity of triple glazing is important to anyone upgrading their current windows, for the extra cost of triple glazing over double people like to see a product that is going to provide years of use. The longevity will depend on many factors:

  • Quality of materials
  • Size of space between panes
  • Temperature differences
  • Workmanship and installation
  • Facing direction and geographic location.

The size of the gap is important for the longevity of triple glazing and must be designed and constructed carefully, too small of a gap results in a loss of radiant heat and too much of a gap will lead to convection current loss and render the use of triple glazing pointless. The materials used for triple glazing will differ depending on the company used. Companies either one or a combination of:

  • Wood
  • Aluminium
  • uPVC

All three are popular but wood is thought to have the best insulating properties, is cheap to use and environmentally friendly.

The Longevity of triple glazing will be backed up by a guarantee from the company that installs the product; the length of the guarantee will differ but is usually in the range of 10 and 20 years. Triple glazing will typically last between 10 and 25 years depending on the geographic location, windows facing north and south will last less than 12 years, a lot less then east and west facing windows.