When considering home improvements, one of the most effective upgrades you can make is installing double-glazed windows. Not only do they improve insulation and security, but they also contribute to lower energy bills and increased property value. However, the cost of double glazing can vary depending on the type of window, material, and supplier. In this guide, we’ll break down the different types of double-glazed windows, their costs, and the potential energy savings they offer.
Typical house in UK with fresh double glazing installed
What is Double Glazing?
Double glazing consists of two panes of glass with a layer of gas or air trapped in between. This design significantly reduces heat loss and noise pollution compared to single-glazed windows. The insulating gap between the panes acts as a barrier, keeping the cold out during winter and the heat out during summer, ultimately improving energy efficiency.
Types of Double-Glazed Windows
The cost of double glazing depends largely on the type of window you choose. Here are some common types:
1. uPVC Double Glazed Windows
uPVC (unplasticised polyvinyl chloride) is the most popular material for double glazing due to its affordability and low maintenance requirements. These windows are durable, resistant to weathering, and provide excellent insulation.
Cost per window: £150 - £450
Lifespan: 20 - 35 years
Pros: Cost-effective, energy-efficient, low maintenance
Cons: Limited colour options, may not suit period properties
2. Wooden Double Glazed Windows
For homeowners who prefer a traditional look, wooden double-glazed windows offer excellent aesthetic appeal. They are often used in conservation areas and period properties to maintain the character of a home. However, they do require regular maintenance to prevent rot and warping.
Cost per window: £600 - £1,500
Lifespan: 30 - 50 years (with proper maintenance)
Pros: Classic appearance, environmentally friendly, durable if well-maintained
Cons: Expensive, requires regular upkeep, susceptible to weather damage
3. Aluminium Double Glazed Windows
Aluminium windows have gained popularity due to their sleek and modern appearance. They are highly durable and require minimal maintenance, making them an excellent long-term investment.
Cost per window: £400 - £1,200
Lifespan: 30 - 45 years
Pros: Strong, slim frames, low maintenance, contemporary aesthetic
Cons: More expensive than uPVC, can conduct heat if not thermally broken
4. Composite Double Glazed Windows
Composite windows combine materials such as wood and aluminium, offering the benefits of both. They have the insulation properties of wood and the durability of aluminium, making them a great choice for homeowners who want a long-lasting, energy-efficient option.
Cost per window: £800 - £2,000
Lifespan: 40 - 50 years
Pros: Strong, energy-efficient, available in a variety of finishes
Cons: Expensive, limited availability
Factors Affecting Double Glazing Prices
Several factors influence the total cost of double glazing installation. Here are some key considerations:
1. Number of Windows
The more windows you replace, the higher the overall cost. However, many suppliers offer discounts for larger installations, reducing the price per window.
2. Size and Style of Windows
Larger windows require more materials and labour, increasing costs. Styles such as bay windows, sash windows, and custom designs are more expensive than standard casement windows.
3. Glazing Type
Upgrading to triple glazing or specialised glass, such as low-emissivity (Low-E) glass, will increase costs but improve energy efficiency and noise reduction.
4. Labour Costs
Labour costs vary depending on location and the complexity of the installation. Some companies offer package deals that include installation, while others charge separately.
5. Additional Features
Extras such as decorative glass, coloured frames, and enhanced security locks can add to the final cost of double glazing.
Estimated Costs for Different Home Sizes
The cost of replacing windows in an entire house depends on the number of windows and the type chosen. Below are estimated price ranges for different property sizes:
Flat (4-6 windows): £3,000 - £5,000
Terraced house (6-10 windows): £4,500 - £7,000
Semi-detached house (10-15 windows): £5,000 - £9,000
Detached house (15+ windows): £7,000 - £15,000
Energy Savings with Double Glazing
One of the main benefits of double glazing is its ability to reduce energy bills. By installing energy-efficient windows, you can minimise heat loss and lower heating costs.
According to estimates, replacing single-glazed windows in a semi-detached house with A-rated double glazing can save homeowners around £140 per year on energy bills. Opting for A++ rated windows can increase savings to £150 annually. Additionally, double glazing can reduce carbon dioxide emissions by approximately 380 - 420kg per year, making it an environmentally friendly choice.
How to Get the Best Deal on Double Glazing
With so many options available, it’s essential to find the best deal without compromising on quality. Here are some tips to help you save money:
Compare Multiple Quotes: Get at least three quotes from reputable suppliers to compare prices and services.
Look for Energy Ratings: Choose A-rated or higher windows to maximise energy efficiency and savings.
Consider Package Deals: Some companies offer discounts if you replace all your windows at once.
Check for Grants or Schemes: Some local councils and government-backed schemes may offer incentives for energy-efficient home improvements.
Avoid Pushy Sales Tactics: Some companies use high-pressure sales tactics to persuade customers into buying expensive packages. Take your time to research and make an informed decision.
Is Double Glazing Worth the Investment?
Although the upfront cost of double glazing can be significant, the long-term benefits make it a worthwhile investment. Homeowners can enjoy lower energy bills, increased comfort, enhanced security, and a boost in property value. Additionally, modern double glazing reduces external noise, making your home quieter and more peaceful.
Conclusion
When choosing double glazing for your home, it’s essential to consider the type of windows, materials, and energy efficiency ratings. While prices vary, investing in high-quality double-glazed windows can lead to substantial long-term savings and increased comfort. By researching and comparing options, you can find the best deal that suits your budget and enhances your home’s energy efficiency.
Whether you’re upgrading your current windows or replacing old, inefficient ones, double glazing is a smart choice for homeowners across the UK. Take the time to explore your options and enjoy the many benefits that double-glazed windows have to offer.