How Much is Double Glazing? Everything You Need to Know

Last Updated on 7 January 2025 by Josh Lucas

What Does Double Glazing Cost?

Double glazing typically costs between £300 and £800 per window, with full-house installations ranging from £4,000 to £7,000.

If you’ve ever asked yourself, “How much is double glazing?” or wondered whether it’s worth the investment, you’re not alone. 

With rising energy costs and the need for better home insulation, double glazing has become an essential home improvement for many UK homeowners. 

This article will guide you through the key factors influencing the cost of double glazing, typical price ranges, and why this upgrade is a smart move. 

From enhancing your home’s energy efficiency to adding value to your property, we’ll ensure you have the information needed to make a confident decision.

Contents at a Glance

• What Influences the Cost of Double Glazing?
• Typical Cost of Double Glazing in the UK
• Saving Money on Double Glazed Windows
• Double Glazing vs. Triple Glazing
• Regulations and Standards for Double Glazing in the UK
• Sustainability and Environmental Impact of Double Glazing
• Choosing the Best Double Glazing for Your Home
• FAQs

What Influences the Cost of Double Glazing?

The cost of double glazing depends on factors such as the type of frame material, the design and style of the windows, the glazing options chosen, and the overall energy efficiency rating of the product. 

These elements work together to determine the final price, ensuring you get the right balance of performance and cost.

Frame Material

uPVC is the most popular and cost-effective choice. Aluminium and timber frames are more expensive but offer unique aesthetic benefits. uPVC combines affordability and durability, making it the most common choice among UK homeowners.

Window Style and Design

The design of your windows plays a significant role in cost. Casement windows are versatile and affordable, while flush sash windows are tailored for heritage properties, blending a timeless look with modern performance. Complex designs or custom shapes will naturally cost more.

Glazing Options

Glazing choices influence both price and performance.

Standard double glazing window cost is more economical than specialized options like triple glazing, Low-E glass, or soundproof glazing. The gas used between panes (argon or krypton) also affects the price.

Installation Requirements

Complex installations often involve challenges, such as working in conservation areas or on irregularly shaped apertures. These can increase costs due to additional labour and materials required to meet specific requirements.

Energy Ratings

Windows with higher energy ratings, such as U-values below 1.0 W/m²K, cost more upfront but save money on energy bills in the long run. Investing in energy-efficient windows ensures excellent thermal performance and contributes to lower household emissions

Typical Cost of Double Glazing in the UK 

When it comes to double glazing there are several influences that can help you understand the cost variations between different types of installations. 

From affordable single windows to full-house solutions, to effectively budget your project.

uPVC Casement Windows

Expect to pay between £300 and £400¹ per window for standard uPVC casement windows. These are ideal for most homes and offer a balance of cost and performance.

Flush Sash Windows

The price for flush sash windows ranges from £600 to £800 ²per window. These windows are perfect for maintaining the traditional look of period homes while offering modern benefits like superior insulation and security.

Double Glaze for a 3-Bed House

For a standard 3-bedroom house, the cost of double glazing windows typically ranges from £4,000 to £7,000³. The final price depends on the number of windows and specific features chosen

Saving Money on Double Glazed Windows

Who doesn’t love saving a bit of extra money?

We know that will be at the forefront of your mind when it comes to shopping for double glazing, and while it can be tempting to cut costs wherever you can, we’re here to help you get the best price while getting you the best quality. 

Choose uPVC Frames

uPVC is known for being budget-friendly without compromising on quality. Its durability and low maintenance make it the most cost-effective choice for window frames.

Opt for Bulk Installations

Installing multiple windows at once reduces labour costs and may qualify you for discounts from installers. This is particularly beneficial for full-house projects.

Energy-Efficient Windows

Invest in low u-value rated windows. These windows can lower heating bills by retaining more heat, offsetting the higher initial investment over time.

Double Glazing vs. Triple Glazing 

Double glazing is great for improving your home’s energy efficiency and ultimately your comfort year-round. 

However maybe you’re looking for something a little extra, that’s where triple glazing might pique your interest. 

But what are the differences?

Double Glazing

Double glazing consists of two panes of glass with a layer of gas in between. It is cost-effective and provides excellent insulation and noise reduction. This option is suitable for most homes in the UK climate.

Triple Glazing

Triple glazing includes a third pane of glass, enhancing insulation and soundproofing further. It’s ideal for colder climates or areas with high noise pollution. 

While triple glazing costs more, it’s a premium option for homeowners seeking maximum energy efficiency and comfort.

Regulations and Standards for Double Glazing in the UK

With any home improvement project, it is important to know what building regulations and standards may stand in the way of you and your brand-new double glazing.

Building Regulations Part L

Building Regulations mandate that replacement windows must meet minimum U-value standards of 1.6 W/m²K. This ensures energy efficiency and reduces household emissions.

Energy Ratings

To maximize efficiency, choose A-rated windows or higher. These windows not only meet regulations but also improve the energy performance of your home.

Secured by Design

This police-backed standard ensures enhanced security features, such as multi-point locking systems and reinforced frames, for additional peace of mind.

Sustainability and Environmental Impact of Double Glazing

Sustainability and being environmentally conscious are at the forefront of everyone’s minds when it comes to home improvement. 

That’s why we’re here to help you make an informed decision when it comes to improving your home. 

Recyclable Materials

uPVC and aluminium frames are highly recyclable, making them an environmentally friendly choice. At the end of their lifecycle, these materials can be repurposed, reducing landfill waste.

Reduced Carbon Footprint

Double glazing minimizes heat loss, reducing energy consumption and household carbon emissions. This makes it a sustainable choice for eco-conscious homeowners.

Longevity

With a lifespan that can exceed 20 years (with the right care and maintenance), quality double glazing reduces the need for frequent replacements, saving resources and reducing waste over time. 

Choosing the Best Double Glazing for Your Home

So how do you choose the best double glazing for your home? 

It comes down to your needs, your budget and the type of style you’re going for when investing in your home improvement dreams. 

Understand Your Needs

Consider whether you’re replacing old windows or installing them for the first time. New builds often require a different approach compared to renovations.

Explore Window Styles

Casement windows offer versatility and affordability, while heritage flush sash windows provide a classic look that is ideal for period properties. Select a style that complements your home’s architecture.

Check the Guarantee

Look for warranties of at least 10 years. A strong guarantee indicates confidence in product quality and ensures peace of mind.

Understand How Much is Double Glazing with GFD Homes 

At GFD Homes, we offer more than just windows; we provide tailored solutions for your home. 

Our range includes Deceuninck Heritage PVC Casement Windows, Flush Casement Windows, and Eurocell Casement Windows, ensuring a style and price point for every customer.

With expert guidance and transparent pricing, we make it easy to understand no matter the budget!

If you still have questions about the cost of double glazing, give our expert team a call on 01642 309 576, Check out our online quote tool for an instant estimate. 

FAQs on How Much is Double Glazing

How much does it cost to replace a window in the UK? 

Replacing a single window costs between £300 and £800⁴, depending on size and style

Is it worth replacing 20-year-old double glazing?

Absolutely. Modern double glazing offers better insulation, reducing energy bills and enhancing home comfort.

How much does it cost to double glaze a 3-bed house in the UK? 

For a standard 3-bed house, prices range from £4,000 to £7,000⁵, depending on the window types and materials.

How to tell if double glazing needs replacing?

Common signs include condensation between panes, drafts, or difficulty opening and closing

Do I need planning permission for double glazing? 

In most cases, planning permission is not required for double glazing unless your property is listed or located in a conservation area. Always check with your local council for specific regulations.

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