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myTriple Glazed Windows Cost
At a Glance
- The average cost of installing triple glazed windows is around £4,000 in the UK.
- Installing triple glazed windows typically takes 3 days to complete.
- NEW! Try our triple glazing cost calculator for an instant estimate.
- A full breakdown of triple glazing costs, including prices per window, per m², and for full house installation.
- Estimated timelines for different triple glazing projects.
- Advice on finding a local window fitter using MyJobQuote.
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£4,000
Table of Contents
Triple Glazing Cost Calculator
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. As a rough guide, the triple glazing cost per m² is around £375 to £450 for standard uPVC casement windows, supplied and fitted.
The final cost will depend on the number of windows, frame material, window style, glazing specification, access, and where you live in the UK.
What is your main reason for installing triple glazed windows?
Increase energy efficiency/reduce costs
3 votes - 75%75% of votes
Block out external noise
0 votes - 0%0% of votes
Improve home security
0 votes - 0%0% of votes
Prevent draughts and increase home comfort
1 votes - 25%25% of votes
To increase the value of your property
0 votes - 0%0% of votes
4 votes
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Triple Glazed Window Prices
So, how much is triple glazing for different-sized houses in the UK?
The table below shows typical triple glazed window prices, including the cost of 1 window and the estimated cost for common property sizes.
| Job Description | Estimated Cost |
|---|---|
| Triple glazing cost per window | £550 |
| Triple glazing cost per m² | £375–£450 per m² |
| 2-bed flat, 4 windows | £2,200 |
| 2-bed terrace, 5 windows | £2,750 |
| 3-bed semi, 8 windows | £4,400 |
| 3-bed semi, 9 windows | £4,900 |
| 3-bed detached, 12 windows | £6,600 |
| 4-bed detached, 15 windows | £8,050 |
Triple Glazing Installer Costs & Timescales
Labour costs make up 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.
| Job Description | Duration | Labour Cost |
|---|---|---|
| 2-bed flat, 4 windows | 1–2 days | £600 |
| 3-bed semi, 9 windows | 2–3 days | £1,350 |
| 3-bed detached, 12 windows | 3–4 days | £1,800 |
| 4-bed detached, 15 windows | 4–5 days | £2,250 |
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How long might it take to have four triple-glazed windows installed in various rooms in my home?
"It depends on the sizes and the type of windows you are installing. Typically single casement replacement would’ve not been more than 1.5 days. Or box type maybe 2 days. It all depends on the space available, sizes, how many fitters doing the job, and type of window."
Types of Triple Glazed Windows
The frame material you choose will affect the cost, appearance, strength, and thermal performance of your triple glazed windows. Triple glazing can also reduce natural light slightly, so frame thickness is worth considering in smaller rooms.
uPVC Triple Glazed Windows
uPVC triple glazed windows are usually the most affordable option. They are low maintenance, widely available, and suitable for most standard homes.
Pros
- ✔ Usually the lowest-cost triple glazing frame option.
- ✔ Low maintenance and easy to clean.
- ✔ Available in white, coloured, and woodgrain finishes.
Cons
- ✖ Coloured or woodgrain finishes can add around 10% to 20% to the price.
- ✖ May not suit every period property.
- ✖ Frame depth can look different if you are only replacing some windows.
Aluminium Triple Glazed Windows
Aluminium triple glazed windows are strong and often have slimmer frames, making them a good choice for larger windows or modern homes where natural light is important.
Pros
- ✔ Strong frames can support heavier triple glazed units.
- ✔ Slim profiles can help maximise natural light.
- ✔ Often suits contemporary properties.
Cons
- ✖ Usually costs more than uPVC.
- ✖ Needs a good thermal break to reduce heat transfer.
- ✖ May not suit traditional homes as well as timber.
Timber Triple Glazed Windows
Timber triple glazed windows are often chosen for period homes, traditional properties, and homeowners who want a natural frame material.
Pros
- ✔ Can offer strong thermal performance.
- ✔ Often suits period and character properties.
- ✔ Provides a more traditional appearance than uPVC or aluminium.
Cons
- ✖ Usually one of the most expensive frame options.
- ✖ Needs more maintenance than uPVC or aluminium.
- ✖ May have longer manufacturing lead times.
Composite Triple Glazed Windows
Composite triple glazed windows combine materials, such as timber and aluminium. They are usually a premium option and may suit homeowners who want strong weather resistance outside with a warmer appearance inside.
Pros
- ✔ Combines the benefits of 2 frame materials.
- ✔ Can offer strong weather resistance.
- ✔ May suit homeowners who want a premium finish.
Cons
- ✖ Usually more expensive than standard uPVC.
- ✖ May have longer lead times.
- ✖ Fewer suppliers may offer composite triple glazed windows.
Double Glazing vs Triple Glazing Cost
The cost of double glazing is usually lower than triple glazing. However, triple glazing can offer better thermal performance and noise reduction, which may make the higher upfront cost worthwhile for some homes.
As a general rule, triple glazing costs around 33% to 50% more than double glazing for a similar window style and frame material.
| Job Description | Double Glazing Cost | Triple Glazing Cost |
|---|---|---|
| Standard uPVC casement window | £400–£800 per window | £550–£900 per window |
| 10 standard uPVC casement windows | Around £4,200 | Around £5,500 |
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Double Glazing
Double glazing is usually best for homeowners who want a lower-cost upgrade from single glazing or old, inefficient windows.
Pros
- ✔ Lower upfront cost than triple glazing.
- ✔ Suitable for many UK homes.
- ✔ Usually easier to source, which can help keep lead times shorter.
Cons
- ✖ Less thermal insulation than triple glazing.
- ✖ May not reduce road noise as much as triple glazing.
- ✖ Might be less suitable for very exposed homes or rooms facing busy roads.
My windows are almost 15 years old but they're double glazed and work ok. Is there any point in replacing them?
"As energy bills rise, it is a good idea to have an expert take a look at your windows to assess how they are holding up after fifteen year.
It may be a case of having some seals replaced that may have perished but if you haven't noticed any real issues, they should be okay!"
It may be a case of having some seals replaced that may have perished but if you haven't noticed any real issues, they should be okay!"
Triple Glazing
Triple glazing is usually best for homeowners who want stronger thermal performance, better sound insulation, or a higher-spec window upgrade.
Pros
- ✔ Better thermal performance thanks to the extra pane of glass.
- ✔ Can reduce external noise more than double glazing.
- ✔ May suit colder, exposed, or high-noise locations.
Cons
- ✖ Higher upfront cost than double glazing.
- ✖ Heavier units need suitable frames and careful fitting.
- ✖ Replacement units may take longer to order.
If you already have modern double glazing, replacing it with triple glazing may not offer enough savings to justify the cost. Triple glazing often makes more sense if you are replacing single glazing, older double glazing, or windows in a cold, exposed, or noisy part of the property.
If your home is losing heat through the loft, walls, doors, or draughty gaps, you may get better value by dealing with these issues before upgrading to triple glazing. You should also check frame depth and finish carefully if you are only replacing one or two windows, as the new units may look different from your existing windows.
Is triple glazing always better than double? Just wondering before I start upgrading my windows.
"Triple glazing is more energy efficient and blocks out road noise more than double glazing"
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.
Ready to compare quotes? With MyJobQuote, you can find a local window fitter by posting details of your triple glazing project. Local window fitters can then contact you with quotes, helping you compare prices before choosing who to hire.
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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FAQs
Can I install triple glazed windows myself?
It is not usually recommended. Triple pane windows are heavy, need accurate measuring, and must be fitted correctly to avoid draughts, poor performance, and warranty issues. Hiring a FENSA or CERTASS registered installer also means the work can be self-certified.
How long do triple glazed windows last?
Triple glazed windows can last 20 to 35 years if they’re properly installed and maintained. The frames often last just as long, but the sealed unit may need to be replaced sooner if it fails.
How much does triple glazing reduce noise?
The extra layer of glass and the additional insulating gap can improve sound insulation and reduce the amount of noise entering your home, so it's worth considering if you live in a noisy area. But if you live in a pretty quiet area, you will probably hardly notice the difference between double and triple glazing.
What are the signs that triple glazing needs to be replaced?
Common signs include misty or foggy glass between the window panes, difficulty with opening or closing your window, draughts, or visible damage to the seals or frame.
Will triple glazed windows add value to my home?
UK Government reports indicate that improving the thermal efficiency of your home can positively impact its market value. Beyond this, triple glazing tends to be a desirable feature for potential buyers if the property is located somewhere that's affected by noise pollution — as it helps to block out external sounds.
Are triple glazed windows popular in the UK?
Triple glazed windows aren't as popular as double glazed windows, which more than 85% of UK homes have installed. However, updates linked to the Future Homes Standard are increasing the focus on low-carbon heating and high levels of energy efficiency in new homes. This means triple glazing may become more common in new builds, although it is not currently required for every property.
