When considering home improvements, understanding the cost of double glazing is crucial for both budgeting and value. Double glazing not only enhances energy efficiency and security but also adds significant comfort and noise reduction to your property.
In 2025, double glazing prices in the UK vary widely depending on factors such as frame material, window style, size, and installation complexity.
This comprehensive guide breaks down current double glazing costs, helping homeowners make informed decisions and find the best value solutions tailored to their needs.
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Double Glazing Prices by Frame Material
Understanding how frame material affects the cost of double glazing can help narrow down options. Different materials offer varying benefits in terms of price, durability, and appearance.
| Frame Material | Price Range Per Window (inc. install) |
|---|---|
| uPVC | £170 – £870 |
| Aluminium | £220 – £1,170 |
| Timber | £330 – £1,470 |
uPVC windows are the most cost-effective choice for most homeowners, combining affordability with decent energy efficiency and low maintenance. Aluminium windows tend to be pricier but offer better structural strength and a modern aesthetic. Timber frames are the most expensive, favoured for their classic look and insulation but require ongoing maintenance.
Average Cost of Double Glazing by Window Type
| Window Type | Price Range (Supply + Install) | Typical Material |
|---|---|---|
| Casement | £500 – £1,250 | uPVC/Aluminium/Wood |
| Tilt & Turn | £600 – £1,400 | uPVC/Aluminium/Wood |
| Sash | £700 – £1,500 | uPVC/Aluminium/Wood |
| Bay (3 panels) | £1,100 – £4,000 | uPVC/Aluminium/Wood |
| Bow | £1,500 – £5,000+ | uPVC/Aluminium/Wood |
| Sliding | £600 – £1,400 | uPVC/Aluminium/Wood |
Casement windows provide a reliable, affordable solution, while sash windows need more intricate mechanisms. Larger formats such as bay windows and bow windows involve substantial material and installation work, which is reflected in their higher prices. These styles enhance aesthetics and room light but require investment.
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Full Property Double Glazing Cost Estimates
If installing double glazing across a whole house, understanding price ranges helps with budgeting.
| House Size | Windows | uPVC Total | Aluminium Total | Timber Total |
|---|---|---|---|---|
| 2-bed house | 4–7 | £2,000–£3,700 | £2,600–£5,400 | £3,300–£7,100 |
| 3-bed house | 8–10 | £4,100–£6,600 | £6,100–£9,700 | £7,000–£14,300 |
| 4-bed house | 12–14 | £6,200–£9,000 | £9,300–£12,900 | £12,300–£17,700 |
These totals include supply and installation, covering typical UK house configurations. Costs can vary due to window quantity, styles chosen, and materials, so obtaining customized quotes remains essential.
Window Size Impact on Double Glazing Cost
Window size influences the price because larger panes need more resources and careful fitting.
| Size (mm) | uPVC | Aluminium | Timber |
|---|---|---|---|
| Small (600x900) | £130–£410 | £180–£600 | £280–£670 |
| Medium (900x1200) | £180–£760 | £220–£860 | £340–£1050 |
| Large (1400x1400) | £250–£900 | £270–£1200 | £390–£1260 |
Medium-sized windows are most typical in UK homes, offering a balance between cost, daylight, and ventilation.
Key Factors Affecting Double Glazing Cost in the UK
How Frame Material Impacts the Cost of Double Glazing
Frame materials differ widely in cost and performance. uPVC is most affordable and practical for many, aluminium fits contemporary tastes, and timber suits traditional or high-end properties despite higher maintenance and price.
How Window Style Affects Double Glazing Prices
Complex window designs, including sash, tilt-and-turn, or bay windows, involve more elaborate manufacturing and installation, increasing total double glazing prices.
Colour Finish and Double Glazing Costs
Non-standard window colours or finishes add cost through additional production processes, a factor to consider when budgeting for custom aesthetics.
Glazing Type and Energy Efficient Double Glazing Prices
Specialist glass types like Low-E and acoustic glass improve insulation or reduce noise but also increase double glazing prices versus standard clear glass.
Installation Complexity Influences Double Glazing Cost UK
Difficult access or large, complex window shapes require extra labour and tools, driving up installation charges within overall double glazing costs.
Custom Glass Features Can Raise Double Glazing Prices
Oversized panels, decorative glass, or security enhancements increase costs due to specialised manufacturing and fitting requirements.
Comparing Double Glazing Quotes to Lower Double Glazing Cost UK
To get the best price, sourcing multiple detailed window quotes from certified suppliers is advised. This approach helps homeowners secure optimal balance of cost, quality, and service in the UK double glazing market.
FAQS
What is the typical double glazing installation process in the UK?
The installation process generally involves measuring your current window openings accurately, removing the old window frames carefully, fitting the new double glazed frames, securing and sealing them properly, and finishing with cleaning and quality checks. Professional installers ensure the window is level and airtight to maximise energy efficiency and durability. Installation for most homes can take 1 to 3 days depending on the number of windows.
How long does it usually take to install double glazing?
For an average home, installing double glazed windows often takes around one full day for up to five windows and two days for larger homes with more windows. Complex window styles or difficult access can extend installation times. Efficient scheduling and preparedness can help speed up the process.
Are there additional costs during double glazing installation that aren’t included in quotes?
Yes, possible additional charges include disposal fees for old windows or frames, repairs to any damage revealed during removal, and extra sealing or finishing touches needed for older properties. Checking quotes carefully and confirming what’s included can prevent unexpected expenses.
What should I do to prepare my home before double glazing installation?
Preparing your home involves clearing the area around windows, protecting furniture to prevent dust damage, ensuring easy outside access for installers, and being ready for some disruption as old windows are removed and new ones fitted. Having refreshments and a plan to manage noise can also help smooth the experience.
Can poor installation affect the performance of double glazing?
Absolutely. Incorrect fitting can lead to draughts, condensation buildup, reduced energy efficiency, and even structural damage over time. It's vital to hire experienced installers who properly seal and secure your windows for long-term performance.
Is it possible to install double glazing myself?
DIY installation is generally not recommended unless you have specific skills and proper tools. Professional fitting ensures safety, compliance, and optimal window performance, protecting your investment.
