triple glazed windows cost
See our guide below to learn how much triple glazed windows cost and what factors affect new window prices.

Triple glazing refers to window units composed of three panes of glass separated by two insulating air gaps or gas-filled cavities. This design creates an effective thermal barrier, significantly reducing heat loss during winter and heat gain during summer. The result is a more comfortable living environment and potentially lower energy bills.
These windows feature three panes of glass, with two spaces filled with insulating gas, typically argon or krypton, which helps to reduce heat transfer and improve sound insulation.
As with any home improvement project, the triple glazed windows cost can vary significantly depending on a range of factors.
Explore with the Safe and Sound windows the various elements that can influence the triple glazed windows Cost, providing you with a better understanding of what to expect when considering this upgrade for your home.
What is Triple Glazing?
Triple glazing refers to windows that have three panes of glass, with two spaces between the panes that are filled with an insulating gas, such as argon or krypton. This design helps to improve the window’s thermal efficiency by reducing heat transfer, which can lead to significant energy savings and increased comfort for the homeowner.
The additional glass pane and insulating gas also provide enhanced sound insulation, making triple glazed windows an attractive option for homeowners who live in noisy areas or are looking to create a more peaceful living environment.
Safe and Sound windows triple glazing is constructed from different types of glass:
- The external pane is made from low iron glass that maximises solar gain.
- Low E glass with a micro layer that reflects heat back into the space makes up the inside pane.
- In order to prevent breaking when heat builds up within the device, the center pane is composed of Low E toughened glass.
- Two inert Argon gas air gap cushions, which are heavier than air and lessen heat transmission, are positioned in between the panes.
- Warm edge spacer bars are positioned between the panes to minimize heat conductivity.
- Five chambers in the uPVC frame minimize heat transfer.
Type of window | U-value |
---|---|
Old single glazing | >4.8 |
Old double glazing | >2.4 |
Double glazing + Low-e + Argon gas | 1.22 – Excellent rating |
Triple glazing+ Low-e + Argon gas | 0.80 – Excellent rating |
The Options that Affect the Cost of Triple Glazing
Here’s where it’s important for someone comparing quotations from various vendors to understand that they are receiving like-for-like comparisons.
At Safe and sound windows, we cover every cost, including installation, rubbish collection, recycling of your old windows, and the window as well as all furnishings and fixtures.
Window Size and Dimensions
Larger windows generally cost more than smaller ones, as they require more materials and labor to manufacture and install.
Window Frame Material
uPVC: Unplasticized Poly Vinyl Chloride (uPVC) frames are a popular and cost-effective choice, offering durability and low maintenance requirements.
Aluminum: Aluminum frames are known for their strength, sleek appearance, and long-lasting performance, but they tend to be more expensive than uPVC alternatives.
Window Styles
Casement Windows:These are the standard window style, opening outward or inward on side hinges. They are typically the most affordable option.
Tilt and Turn Windows: These versatile windows can tilt inward for ventilation or open fully, offering increased functionality. They are generally more expensive than casement windows.
Bay Windows: Bay windows protrude outward from the wall, creating additional living space and providing panoramic views. Due to their complexity, they are among the most expensive window styles.
The cost of a triple glazed bay window can be up to 150% more than a casement window.
Sash Windows: Traditional sash windows, with sliding panels, can be challenging to triple glaze due to the increased weight of the units, potentially driving up costs.
Glass Specifications
The type of glass used in the triple glazed units can also impact the cost. Low-emissivity (Low-E) coatings, argon gas fills, and specialized glass types (such as self-cleaning or noise-reducing glass) can add to the expense but offer enhanced performance and functionality.
Installation Complexity
The complexity of the installation process can significantly influence the overall cost. Factors such as accessibility, the need for scaffolding, and the condition of the existing window openings can all affect the installation costs.
Additional Features and Customizations
Customizations and additional features, such as decorative glass, specialized hardware, or bespoke color options, can increase the triple glazed windows cost.
Benefits of Triple Glazed Windows
Improved Thermal Efficiency: The additional glass pane and insulating gas in triple glazed windows help to reduce heat transfer, leading to lower heating and cooling costs and improved energy efficiency.
Enhanced Sound Insulation: The extra layer of glass and insulating gas in triple glazed windows provides superior sound insulation, creating a more peaceful living environment.
Reduced Condensation: The improved thermal efficiency of triple glazed windows can help to reduce the risk of condensation buildup, which can lead to mold and mildew growth.

Thinking About New Triple-Glazed Windows?
View the safe and sound windows range of Triple Glazing.
What should your quote for triple glazing include?
Make sure you are comparing like-for-like when comparing the price of triple glazing from various providers.
There are several factors to take into account that might significantly change a price, as we have already said.
Make sure the following is included in your triple glazing pricing if you decide to compare quotes:
- A full technical survey with drawings
- Full product details of size, style, colour etc.
- The number of windows
- The WER and U-values for the glass
- Additional features, such as handles and locks
- Disposal of your old windows
- Guarantees for products
Triple glazing vs Double glazing comparison
Double glazing | Triple glazing | |
---|---|---|
Energy rating | A+ | A++ |
U Value (heat transfer) | 1.22 | 0.80 |
G Value (solar gain) | 0.46 | 0.40 |
L Value (air leakage) | 0 | 0 |
Cost | ⭐⭐⭐ | ⭐⭐⭐⭐ |

Is triple glazing right for me?
Whether triple glazing is the right choice for your home will depend on a variety of factors, including your climate, energy efficiency goals, budget, and personal preferences.
If you live in a region with extreme temperatures, either hot or cold, triple glazed windows can provide significant energy savings and improved comfort. They can also be beneficial for homeowners who live in noisy areas, as the enhanced sound insulation can create a more peaceful living environment.
However, the higher upfront triple glazed windows cost may not be suitable for all budgets. In such cases, homeowners may opt for double glazed windows, which offer improved energy efficiency and sound insulation compared to single glazed windows, but at a lower cost.
Ultimately, the decision to install triple glazed windows should be based on a careful evaluation of your specific needs and the long-term benefits they can provide.
Safe and Sound Energy Efficient Windows
Triple glazing FAQs
The main benefits of triple glazed windows include improved thermal efficiency, enhanced sound insulation, increased home security, reduced condensation, and potential increases in property value.
Triple glazed windows offer better thermal and sound insulation than double glazed windows, but they also come with a higher upfront cost. The choice between the two will depend on your specific needs and budget.
For many homeowners, the long-term energy savings and improved comfort provided by triple glazed windows can make the higher upfront cost worthwhile, especially in regions with extreme temperatures or high noise levels.
For the ultimate comfort and energy efficiency in your home
The superior efficiency of triple glazing reduces carbon emissions, uses less energy to heat and creates living space comfort you can’t compare.