Triple Glazed Windows Cost

What is Triple Glazing?

Triple glazing simply uses three panes of glass within a sealed frame instead of the more traditional two panes. Between the three panes are small gaps which are filled with air or a gas such as argon or krypton.

So, although glass conducts heat fairly well, double and triple-glazed windows reduce this heat loss using the layers of air/gas in between the panes, making it a lot harder for heat to escape.

Triple glazing is expensive but usually better when it comes to heat insulation, so it is most popular in Scandinavian countries and other regions with very cold winters.

In the UK right now, double glazing is still more popular, but triple glazing is rapidly catching on. Triple glazing can help to combat heat loss during the cold winter months, and it does the same job as double glazing, but with another layer of glass to improve performance.

How to Find a Window Fitter

It's crucial that triple glazed windows are fitted correctly. Poorly fitted triple glazing will simply be a waste of money!

With MyJobQuote, you can easily and quickly find a local window fitter to install triple glazing for you.

And it's simple: Just fill in a few details about the job, along with your contact information, then sit back and let window fitters get in touch with you to provide quotes.

How Much Does Triple Glazing Cost?

On average, triple glazed windows cost between £2,000 and £5,000 in the UK.

Expect to pay around £550 per triple glazed window for a standard size, supplied and fitted.

The cost of triple glazing can vary based on several factors. For insights into how the broader construction industry impacts these costs, you might want to take a look at recent construction stats.

Triple glazing is more expensive than the cost of double glazing, amounting to roughly 33% – 50% more for exactly the same style of window. Fitting triple glazing is beyond most DIY enthusiasts, so local joiners or window fitters will be required.

Often, the company selling the windows will also provide an installation team. However, there is nothing to stop you from shopping around for windows directly from the manufacturer online and then hiring a fitter to install them for you.

Triple Glazed Window Prices

So, how much is triple glazing for different-sized houses in the UK?

The table below shows the cost of triple glazing for a 3-bed house with a different number of windows, a 4-bed detached house, and a typical 2-bedroom flat in the UK.

Triple Glazing Installer Costs & Timescales

Labour costs make up to around 30% of the overall triple glazed windows price.

Window fitters typically work in pairs, which helps with the heavy lifting involved in handling triple glazed windows. Labour costs work out at around £150 per window, or approximately £200 per fitter per day.

A single triple glazed window usually takes around 2 to 3 hours to fit with two people, which includes frame replacement.

The table below estimates how much the labour element of a triple glazing job could cost. It also includes estimated time frames for having the work done.

Factors That Impact Triple Glazing Costs

The cost of triple glazing varies based on several factors. Let's take a look at what impacts your overall quote:

• Size of the Job — The more windows you need, the higher the overall cost. However, most window fitters offer better rates for larger jobs, so the price per window often works out lower.
• Frame Material — uPVC frames are the most affordable option and remain the most popular choice in the UK. Timber and aluminium frames cost more.
• Window Size and Style — Larger windows cost more, and sash, bay, and tilt-and-turn styles are pricier than standard casement windows due to their complexity. Coloured or woodgrain finishes are around 10% to 20% more than white uPVC.
• Glazing Features — Argon gas fill is standard, but denser gases like krypton improve insulation and cost more. Low-E coatings enhance energy efficiency, and warm-edge spacer bars perform better than standard metal ones, both of which add to the price.
• Location — Window fitters in London and other big cities typically charge more than those in small towns and rural areas.
• Ease of Access — If upstairs windows are difficult to reach, you may need to consider the cost of scaffolding in your quote. Ground floor replacements are quicker and easier, which keeps labour costs down.
• Waste Removal — Old windows and frames need to be disposed of properly. Most fitters include removal in their quote, but it's worth checking before you commit.

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Key Things to Consider Before Installing Triple Glazed Windows

• Is your home already well-insulated? Triple glazing will usually make your home energy efficient, but the benefits will be minimal if other parts of the building are losing heat. In such cases, triple glazing may not be the best investment, and you should look at other, simpler and cheaper options. This might include cavity wall insulation, loft insulation, draught excluders, and curtains.
• Have you considered the frame material? Few triple glazing companies take into account the frame of the windows. uPVC is a poor insulator but is still the most commonly used frame material for double and triple-glazed window units in the UK. If you are considering triple glazing, consider timber-framed windows with triple glazing to improve the thermal efficiency of your home as much as possible.
• Are your existing frames strong enough? The frames need to be more robust to support the three layers of glass. Your window fitter will be able to advise whether any reinforcement work is needed before installation.
• Will you lose natural light? Triple glazing may slightly reduce light levels, which is worth considering if you have smaller windows or rooms where natural light is already limited.
• Are you prepared for longer waiting times? Triple glazed windows are less commonly stocked than double glazed, so they often take longer to manufacture and deliver. It's worth factoring this in if you're working to a specific timescale.
• Are you replacing all of your windows at once? If you're only replacing one or two of your windows, the new triple glazed windows may look noticeably different from your existing windows in terms of frame depth and glass appearance.
• Do you already have modern double glazing? The savings made by replacing modern double glazing with triple glazing are minimal. Often, triple glazing only really makes financial sense if you are replacing single glazing or old inefficient double glazing.

Can I Install Triple Glazed Windows Myself?

Triple glazed window fitting is not usually a job you can do as a DIY project.

While it's true that you could reduce the cost of triple glazing by removing labour costs from the quote, there are some key pitfalls to bear in mind:

• Measurement Errors — Measuring windows prior to ordering is important. Errors can mean windows that don’t fit, or paying to re-order.
• Poor Installation — If triple pane windows aren’t installed correctly, you won’t get the full benefits. Proper fitting is as important as the glass.
• Underestimating The Weight — It can be physically difficult, since the frames need to be more robust. This may require multiple people and be risky at height.
• Voiding Warranties — Warranties and certificates may be void if not professionally installed. This may mean no guarantees if there’s a problem.

Overall, while you may be able to bring the triple glazing cost down, the risks and expense if you get things wrong can be high.

Checklist: Finding Triple Glazed Window Installers Near You

• Are they FENSA or CERTASS registered? Window fitters registered with these schemes can self-certify their work.
• Are they a member of a recognised trade body? A Glass and Glazing Federation membership can be a good sign that you’re hiring a specialist.
• Do they include a warranty? Check any warranties they offer cover both the windows themselves and the installation work.
• Are they insured? Look for public liability insurance in case something goes wrong during the installation.
• Is waste removal included? Window fitters will typically dispose of your old windows, but it’s best to confirm whether disposal is included in the total quote.
• Do they have experience? Ensure the fitters you hire have plenty of experience with triple glazing.
• Do they have examples of similar work? Look for recent photos on their MyJobQuote profile to see previous work they have completed.
• Do they have positive reviews? Check the feedback they have received from other homeowners on their MyJobQuote profile.

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