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Triple Glazing Costs, Calculator & Free Quotes

Last Updated on By Jon

Looking to upgrade your windows to the very latest in both heat and sound insulating properties? Our guide to triple glazing installation costs looks at factors affecting every aspect of the install, along with weekly updated 2024 prices.

home triple glazing costs

Lets start off with some average prices for triple glazing installations:

Property Type No. of Bedrooms Average Price
Two-bedroom flat 3 £1,421.00
Two-bedroom flat 4 £1,911.00
Two bedroom terrace 5 £2,401.00
Two bedroom semi-detached 6 £2,851.80
Two bedroom semi-detached 7 £3,327.10
Three bedroom semi-detached 8 £3,822.00
Three bedroom semi-detached 9 £4,277.70
Three bedroom detached 10 £4,753.00
Three bedroom detached 11 £5,228.30
Three bedroom detached 12 £5,703.60
Three bedroom detached 13 £6,178.90
Three bedroom detached 14 £6,654.20
Four bedroom detached 15 £7,129.50

(Prices taken from multiple sources and averaged)

Prices Checked 18/04/2024

Triple Glazing Cost Calculator

No. of Windows:
Cost Per Window: £
Total Cost: £

(Live prices updated weekly)

Factors affecting triple glazed window costs

Many homeowners don’t realise that it is essential for an installer to inspect a property thoroughly before they will be able to provide an accurate quote to have any triple glazed windows installed. Other factors that determine the cost of your installation will include your location in the UK, size of the windows needed, amount of windows being installed and the type of frames being used on them.

Timber and aluminium window frames will be costlier than UPVC, but as mentioned previously, they will provide better levels of insulations.

In most cases, the cost of a triple glazed window will be approximately 30% to 40% more than that of one which is double glazed. For example, if you’ve been quoted £300 for a double glazed window, you can expect to pay anywhere between £400 and £500 if you opt for triple glazing.

Here are a few cost estimates to have triple glazed windows installed in residential properties of different sizes:

  • Standard detached home consisting of 12 triple glazed windows – approximately £5,500 to £6,500
  • Semi-detached two bedroom home – between £3,000 and £4,500
  • Two-bedroomed terrace home with five windows – approximately £2,200 to £2,500
  • Two-bedroomed flat – between £1,800 and £2,100

Although the cost of installing triple glazing will increase with the amount of windows that are needed, the overall cost of each window reduces when the amount of windows being installed increases. This means that you could qualify for a fair discount if you’re able to have all of your home’s windows replaced at the same time.

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Comparing Double Glazing to Triple Glazing

Although not many UK homes have had triple glazing installed as yet, the demand for this type of window is growing slowly because more and more homeowners are realising how beneficial it can be with regards to improving overall insulation.

Although double and triple glazing both work on the same principle, triple glazed windows contain three sheets of glass with a layer of insulating gas between each. Double glazed panes only contain two glass layers. This means that triple glazing will normally be a better option than double glazed windows because it can help reduce energy bills even further over time that standard double glazing.

Homeowners who decide to install triple glazed windows must take into account that many suppliers provide them with UPVC frames. While these may require less maintenance over time, they are not able to provide any more insulation than double glazed windows. As a result, homeowners who want to reduce their energy bills must insist on having timber frames installed with these windows. This will provide maximum insulation over time.

Pros and Cons of Triple Glazing

After finding out the approximate cost of having triple glazing installed throughout a property, homeowners often want to know what the pros and cons are.


  1. Triple glazing reduces the amount of heat that is lost through your home’s windows, thus helping to reduce heating bills and improve overall energy efficiency.
  2. Your home stays warmer during those chilly and icy winter months.
  3. Less outside noise is able to enter your home because of the additional pane of glass.
  4. Your home’s overall security is improved because it is far more difficult to break triple glazed windows than double glazed panes.
  5. You could save up to £175 per year on your energy bills


  1. Triple glazed windows are costlier than double glazed panes
  2. The amount of natural light that is able to enter your home is reduced a little because of the additional pane of glass.

Although triple glazing has the ability to reduce your energy bills over time, it will not be as effective at doing this if you haven’t taken other measures to reduce energy consumption as well. For instance, they won’t help much if heat is escaping through the walls of your home. As such, it’s recommended that you have an energy audit performed so that you can determine where the most energy is being lost in your home.

double glazing vs triple glazing

Further Information

Continually increasing costs of energy such as heating oil, gas and electricity have resulted in more homeowners than ever before searching for ways to improve energy usage wherever possible. Not only will this save on energy costs in the long term; it will also help reduce the demand for fossil fuel consumption over time.

A home that has older double glazed windows is able to lose as much as 20% of generated heat, which can be costly in terms of energy expenses.

Air gaps between each of the glass sheets in a set of double pane windows will all eventually fail as they get older, and the most common symptom indicating that this has occurred is when you start seeing moisture and condensation forming between each of the layers of glass.

When your double glazed windows start becoming damp between the panes, the only solution is to have them replaced. Although you can simply have new double glazed units installed, you could also opt for triple glazed windows instead.

How much can I save on my bills if I fit triple glazing?

If you are upgrading from older single-glazed windows directly to a triple-glazed system you could make significant savings on your heating bill. In fact you could save as much as 50% of your heating bill which on average equates to about £175 per annum. If however you are upgrading from more modern double-glazed units then the savings will be minimal (and you should question whether it is worth the installation expense).

Does triple glazing reduce noise significantly?

Yes. Adding a third pane of glass, and therefore 2 layers of air insulation gap will significantly reduce the outside noise pollution. They can be particularly useful if you live near a busy road, or any industry that creates noise that can be disruptive. The difference in noise reduction from a single pane to triple panes will be significant, however upgrading from double-glazing will be less noticeable.

Obtain your Free Quotes Today

If you have decided to have triple glazed windows installed in your home, obtaining quotes from trusted service providers is as easy as filling in our short website contact form. After submitting your form, you will be contacted by the relevant service providers so that property inspections can be carried out and quotes provided to you as soon as possible.

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