What is double glazing?

What is double glazing?

Discovering a chill in your home or facing exorbitant heating bills? The culprit might just be your windows. Whether they’re single glazed or poorly fitted, they could be allowing precious heat to escape and chilly draughts to creep in.

If this resonates with your situation, it might be the opportune moment to explore the installation of double glazing. But what exactly is double glazing, and how does it function?

Crucially, what’s the price tag for having double glazed windows installed? All these queries and more will be addressed in our informative guide to double glazing, shedding light on its energy efficiency and eco-friendliness.

Let’s kick things off with the fundamentals.

What is double glazing?

Double glazing is a technology designed to enhance the thermal performance of windows, providing increased insulation for homes and buildings. Unlike traditional single-glazed windows, which consist of a single pane of glass, double glazing incorporates two panes separated by a layer of air or inert gas, such as argon.

This construction creates a barrier that helps to reduce heat transfer, making interiors more energy-efficient by retaining warmth during colder seasons and blocking excessive heat in warmer climates.

Beyond temperature control, double glazing also serves as an effective sound insulator, minimising external noise. This technology has become a popular choice for homeowners seeking to improve energy efficiency, reduce heating costs, and create a more comfortable and quiet living environment.

Is double glazing environmentally friendly?

Double glazing is considered environmentally friendly due to its positive impact on energy efficiency and reduced carbon footprint. The enhanced insulation provided by double-glazed windows helps to lower the demand for heating and cooling systems, subsequently decreasing energy consumption.

By conserving energy, double glazing contributes to lower greenhouse gas emissions and overall environmental sustainability. Additionally, the increased thermal performance can potentially lead to a reduction in the use of fossil fuels for heating purposes, aligning with efforts to combat climate change.

Some double glazing designs use environmentally friendly materials, and the longevity of these windows can result in fewer replacements and less waste over time. While the production process of double glazing involves materials like glass and framing, the long-term energy savings and environmental benefits make it a relatively eco-conscious choice for those looking to make their homes more sustainable.

Which are the most energy-efficient windows to choose?

Not all double glazed windows are equal in terms of energy efficiency. The British Fenestration Ratings Council (BFRC) assigns a rating to each type of double glazed window based on its performance.

The scale ranges from G to A+, with A+ being the most efficient. These ratings consider how effectively the window prevents heat from escaping, the amount of air that escapes through or around the window, and the level of solar heat gain, indicating the sunlight passing through the glass.

For those prioritizing energy efficiency when shopping for double glazing, it’s advisable to seek out windows with A and A+ ratings. This classification system offers consumers a clear indication of a window’s effectiveness in conserving energy.

More benefits of double glazing

Windows equipped with double glazing go beyond enhancing the energy efficiency of your home; they bring forth a myriad of additional advantages, such as:

  • Condensation Control: Single-glazed windows often face issues with condensation, where moist air meets the cold glass surface. Double glazing acts as a preventive measure, inhibiting condensation formation.
  • Sound Insulation: Residing near a busy road, school playground, or in a bustling city? Double glazing not only provides heat insulation but also serves as an effective sound barrier. The additional glass layer cushions and minimises medium to high-frequency noise, transforming your living space into a peaceful retreat.
  • Summer Cooling: While double glazing is commonly associated with winter warmth, its insulation benefits extend to summer. By blocking external heat, it keeps your home cooler on hot days, enhancing overall comfort.
  • Reduced Energy Bills: As your heating system bears a lighter load in maintaining warmth, double glazing contributes to smaller energy bills. Improved home insulation translates to decreased spending on gas and electricity for heating.
  • Property Value Boost: A home lacking double glazing may deter potential buyers. In today’s market, where energy efficiency is highly sought after, investing in double glazing can increase your property’s appeal. Government reports indicate that energy-saving enhancements could potentially lead to a substantial 14% to 38% surge in your home’s value.

How much does double glazing cost?

While the installation of double glazing may not be budget-friendly upfront, consider it a prudent investment. The initial substantial cost is an investment that is anticipated to yield returns over time through notable reductions in energy bills and, potentially, an augmented value for your home.

On average, the cost for double glazing in a house, encompassing eight windows and two uPVC doors, hovers around £4,500. If you are seeking glass replacement costs for existing windows, the outlay is somewhat more economical, averaging around £120 per project for supply and installation.

For those committed to making substantial energy-efficient enhancements and with the financial means, exploring the potential cost of triple glazing installation is an option, promising the epitome of window insulation.

How to install double glazing

Opting for the installation of double glazed windows necessitates the expertise of a seasoned professional. Their proficiency ensures a flawless fit, seamlessly incorporating the new window without compromising the integrity of the glass or frame.

A skilled installer goes beyond mere placement, guaranteeing a precise seal that effectively shields against draughts and heat loss, safeguarding the energy-efficient performance of your double glazing.

Choosing a qualified and experienced double glazing installer is a judicious decision, ensuring the meticulous execution of the installation process. If your budget permits, prioritizing the most energy-efficient windows available is a wise investment for long-term performance and satisfaction.


Do double glazed windows need any maintenance?

Double glazed windows are low-maintenance. Regular cleaning with mild detergent or glass cleaner keeps them looking good. Periodic checks on seals and hardware ensure optimal performance. Addressing issues promptly maintains their durability.

How do I tell if I already have double glazing?

To check if you already have double glazing, inspect the window closely. Double glazed windows typically have two panes of glass with a sealed gap in between. Look for a spacer bar or signs of condensation between the panes. If uncertain, a professional can assess your windows to confirm their type and efficiency.

Can I fit double glazing myself?

Fitting double glazing is a complex task that requires expertise. It’s recommended to hire a professional installer to ensure precise fitting, prevent damage, and guarantee an effective seal. DIY installation may lead to performance issues and compromise energy efficiency. Hiring a qualified expert is the safest and most effective approach for installing double glazing.

Need further information?

If you’re a Chesterfield homeowner considering the installation of double glazing and seeking a quotation, reach out to Chesterfield Window Centre at 01246 912106. Their dedicated team is ready to assist you and provide the information you need to make an informed decision about enhancing your home with double glazing.

Director at Chesterfield Window Centre | Website | + posts

In 2005, I founded Chesterfield Window Centre with a vision to redefine the window and door industry through a commitment to quality, innovation, and customer satisfaction. The journey began with a deep understanding of the market, identifying gaps, and envisioning a business that not only meets but exceeds customer expectations.

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