DIY Tips: A Guide to Triple Glazing

Originally designed for harsh winters in Canada and through Scandinavia, triple glazing is much more thermally efficient than double glazing. Learn more about it with this guide and check this link for glaziers who’ll be able to give you more advice.


Benefits of Triple Glazing

The first major benefit of triple glazing is its thermal efficiency. The house will stay warmer and this means that you’ll have to use less energy heating your home, lowering your energy bills – which is good for your pocket and for the environment. Sound insulation is also improved and because thermal efficiency is improved, the home stays warm in the winter and cool through the summer.

How Does Triple Glazing Work?

Triple glazing consists of three layers of glass with two air gaps between the three layers. The glass can be treated to make it more energy efficient, and gas can also be pumped into the air gaps in order to reduce heat loss.

Where Can Triple Glazing Be Used?


Triple glazing can be used for windows, doors, walls of glass and roof lights. Although triple glazed units weigh more than double glazed units, walls and lintels can usually carry this weight. Generally, your system provider (doors or windows) will simply adjust the size of the frame to fit the windows. If you’re replacing existing glazing, speak to your building contractor to see whether you need to replace joists and lintels.

What Are the Triple Glazing Options?

Some people think that the triple glazing will make their home darker and although a small amount of light will be lost, thermal efficiency improves and so you can use the glazing in a larger area, which will in turn bring in more light.

Metallic coatings can also be added to the inner layers to reflect heat back into the property. Triple glazing can also be toughened, just like spectacles. Gases are often used to fill the air gaps in order to further improve thermal performance but it’s worth noting that this gas can often leak, meaning that it won’t last as long as the window unit itself.

Which Frame is Best for Triple Glazing?

A window frame should have a good U-rating – a measure of the thermal values of that material. Timber is the best choice, as it has a better U-value than metal. Many triple glazed units are actually available from Scandinavia complete ready-made, encased in timber. Another choice is an FSC hardwood, such as oak or a temperate softwood clad with aluminium.

What Does Triple Glazing Cost?

Triple glazing tends to cost between 20-40% more than double glazing.

Source: 4Homes