Every penny counts when it comes to saving money on your heating bills. Foot for foot, you lose more heat through your windows than anywhere else in your home. Anywhere between 10% to 18% of your home\u2019s warmth goes straight out of the windows, putting glazing right up there with roofs, walls and floors as the main contributor to heat loss. <\/p>\n\n\n\n
Because of this, the type of windows you have will be taken into account by an energy assessor to determine the energy rating of your home for its Energy Performance Certificate<\/a>.<\/p>\n\n\n\n Triple glazing is installed as standard in new homes in colder climates, like Scandinavia and Canada. And now, many home-owners in the UK are considering triple glazing as an effective way to make their homes more energy efficient. <\/p>\n\n\n\n Here\u2019s what you need to know about triple glazing. <\/p>\n\n\n\n It\u2019s not one, not two, but three layers of glass within a sealed, airtight unit in your windows. The cavity between each pane is filled with air or an inert gas \u2013 most commonly argon or xenon \u2013 that acts as additional thermal insulation. <\/p>\n\n\n\n Quite simply, the number of panes. That extra third layer of glass, and the additional layer of air or gas, is the difference. Triple glazing is, in general, heavier, and more insulating than double glazing. <\/p>\n\n\n\n Externally, there should be no visible difference between good quality double and triple glazing. Building regulations do not permit single glazing to be installed in the UK today, apart from in some listed properties. <\/p>\n\n\n\n Here\u2019s the science. You need to consider your windows U-value<\/em> (thermal performance) and G-value<\/em> (solar performance). The better a home is insulated, the lower the U-value will be. The more solar heat is allowed into a building \u2013 from the sun\u2019s rays \u2013 the higher the G-value will be. In warmer climates, you want the G-value to be lower to prevent too much heat coming in. <\/p>\n\n\n\n Triple glazing has a better U-value than double glazing because it\u2019s more effective at retaining heat inside the house. However, double glazing is more effective than triple glazing at letting warmth from the sun into your house (the G-value). But in the UK, thanks to our climate, the difference in G-value between double and triple glazing is small. <\/p>\n\n\n\n Consider also what direction your windows face. Triple glazing might be best on north facing windows where there is less potential benefit from G-value. And you might prefer to choose double glazing for south-facing windows and benefit from the heat of the sun. But it\u2019s possible to have a mixture of double- and triple-glazed windows in your home. <\/p>\n\n\n\n The British Fenestration Rating Council (BFRC) assesses the energy performance of windows and doors with ratings that go from A++ (the best) to E. <\/p>\n\n\n\n A to A++ is considered to be energy positive. <\/p>\n\n\n\n The thermal insulation of triple glazing helps to keep warm air inside your house and prevent cold air coming in, which reduces heat loss through your windows and glazed doors. This improves a home\u2019s carbon footprint and lowers heating bills. <\/p>\n\n\n\n Triple-glazed windows are far harder to smash, and because they\u2019re a sealed unit, they\u2019re more difficult to lever from the outside, making your house more secure. <\/p>\n\n\n\n They\u2019re also an effective noise dampener. Their good sound insulation will make your home quieter. And they lower condensation inside your home. <\/p>\n\n\n\n Overall, these advantages could be good selling points to highlight to future buyers when it comes time for you to move. <\/p>\n\n\n\n Triple glazing is more expensive \u2013 see below \u2013 and those three panes of glass are heavy, meaning that you might have to spend more on the window frame and hinges to support them. <\/p>\n\n\n\n They might not be suitable for your home if you live in a listed property, and you\u2019ll probably need to get permission if you live in a conservation area. <\/p>\n\n\n\n Triple-glazed units cannot be easily repaired. While they are robust, if they do become damaged and condensation forms between the layers, you\u2019ll need to replace the entire unit. <\/p>\n\n\n\n Triple glazing is on average at least 20% more expensive than double glazing. For a ballpark figure, allow at least \u00a32,000 to \u00a32,500 for triple glazing four windows. <\/p>\n\n\n\n Adding extra insulation can push the price up too. For example, invisible Low E glass, which has a metal oxide coating that reflects heat back into the room, or a more expensive and effective insulation gas in the gap between the panes, will add to the overall cost. <\/p>\n\n\n\n Yes. On average, triple glazing is 40% to 50% more thermally efficient than older double glazing, especially with a well-insulated frame. <\/p>\n\n\n\n The technical explanation is as follows: triple glazing has a U-value (measuring the thermal loss) of around 0.8 W\/m2K (watts per square metre per degree Kelvin). Modern double glazing has around 1.1 W\/m2K and older double glazing is closer to 3 W\/m2K. For single glazing, this rises to 5.2 W\/m2K. <\/p>\n\n\n\n New building regulations introduced in June 2022 state that any new building in the UK must have windows with a U-value of 1.4 W\/m2K or less. <\/p>\n\n\n\n In theory, yes, but the additional weight that triple glazing carries may require changes to existing window frames. <\/p>\n\n\n\n Most manufacturers say their triple glazing should last for 20 years. After that time, the energy efficiency is often not as effective. <\/p>\n\n\n\n There\u2019s a reason why triple glazing has been used so extensively in northern Europe for years. However, significant improvements to the U-value of double glazing in recent years has lowered the gap between double and triple glazing. Upgrading to triple glazing accounts for a 5% improvement in the overall energy performance of a new house, according to figures from Homebuilding.co.uk<\/a>. <\/p>\n\n\n\n It could be, if you\u2019re replacing single-glazed windows, or windows with older double glazing. Or if you have an issue with noise outside your house, or you live in an especially cold area. <\/p>\n\n\n\n The improvement in heat retention and energy efficiency, and the money you can save, can be significant. If you\u2019re replacing relatively new double glazing, it might not prove worthwhile. However, like underfloor heating compared with conventional heating, triple glazing is undoubtedly \u201cbetter\u201d for energy efficiency and for lowering the carbon footprint of your home. <\/p>\n\n\n\n Want to check your home\u2019s energy rating? Find out how to check your Energy Performance Certificate<\/a>.<\/strong><\/p>\n\n\n\nWhat is triple glazing? <\/h2>\n\n\n\n
What\u2019s the difference between double and triple glazing? <\/h2>\n\n\n\n
What does U-value and G-value mean \u2060\u2014 and why are these terms important? <\/h2>\n\n\n\n
Are there any other rating systems to know? <\/h2>\n\n\n\n
What are the benefits of triple glazing? <\/h2>\n\n\n\n
Reduction of heat loss in your home <\/h3>\n\n\n\n
Home security <\/h3>\n\n\n\n
Noise reduction <\/h3>\n\n\n\n
What are the disadvantages of triple glazing? <\/h2>\n\n\n\n
The cost <\/h3>\n\n\n\n
Triple glazing isn\u2019t suitable for all homes <\/h3>\n\n\n\n
Triple-glazed windows are difficult to repair when damaged <\/h3>\n\n\n\n
How much does it cost to triple glaze windows? <\/h2>\n\n\n\n
Does triple glazing improve energy efficiency? <\/h2>\n\n\n\n
Can I triple glaze existing windows? <\/h2>\n\n\n\n
How long do triple glazed windows last? <\/h2>\n\n\n\n
How much warmer is triple glazing? <\/h2>\n\n\n\n
Is triple glazing right for my home? <\/h2>\n\n\n\n