In the quest for energy efficiency, double glazing is often hailed as a hero. It promises to reduce heat loss, combat noise pollution, and lower our energy bills. But is it possible that your double glazing could be contributing to higher energy costs? Here we’ll explore how and why this might be occurring and what you can do about it.
The Age and Quality of Your Double Glazing
The effectiveness of double glazing largely depends on its age and quality. Double-glazed windows that were fitted several decades ago may not be performing optimally today. Over time, the sealant around the window can deteriorate, which might lead to drafts and an increased flow of heat in and out of your home. Meanwhile, if the installation was of poor quality, your windows might never have provided the insulation you expected.
When double glazing starts to fail, it often goes unnoticed until you feel a draught or see condensation. Such signs could be a clue that your double glazing is letting out heat during the winter and letting it in during summer, thus making your heating and cooling systems work harder. This increases your energy usage, and consequently, your bills.

Technological Advancements in Double Glazing
As with all aspects of home improvement, technology improves over time. Modern double glazing units are far more advanced than those made even ten years ago. Today’s products feature improved gaskets, seals, and framing materials, all designed to enhance thermal efficiency. Innovations such as low-emissivity (low-E) glass and inert gas fillings between the panes provide additional insulation.
Updating to newer double glazing can help you take advantage of these technological improvements. At JWS, our range of UPVC windows and doors incorporates the latest innovations in double-glazing technology. From sliding sash to casement windows, our high-quality installations ensure you regain control over your home’s energy efficiency.
Is It Time for an Upgrade?
Evaluating whether your double glazing is increasing your energy bills can seem daunting. However, if you have noticed a spike in your energy costs, or your home feels less comfortable, it may be time to consider an upgrade. Sometimes, simple maintenance, like replacing seals, can improve the situation. In other cases, a full replacement might be necessary to achieve optimal energy efficiency.
JWS offers tailored solutions that cater to both your aesthetic preferences and energy needs. From conducting initial assessments to find out whether your current windows are performing as they should, to installing brand-new double or triple glazing that maximises comfort and efficiency, our team provides expert guidance and high-quality service every step of the way.

Get in Touch for Expert Advice
If you suspect your double glazing might be causing your energy bills to rise, don’t hesitate to reach out for an expert assessment. Contact JWS today to discuss how we can help improve the energy efficiency of your home with the latest in double glazing solutions. Whether it’s upgrading one window or undertaking a full replacement, we are here to help you find the most cost-effective and energy-efficient solutions.
By choosing to upgrade your double glazing with JWS, you are not only enhancing the thermal comfort of your home but are also investing in solutions that could decrease your energy expenditures in the long run. Get in touch now or use our online quoting engine to receive a tailored price based on your requirements. With the right double glazing, you can improve your home’s comfort, energy efficiency and overall performance.
- Could Your Double Glazing Be Increasing Your Energy Bills? - September 24, 2026
- Choosing the Right Front Door: uPVC or Composite? - September 15, 2026
- Why Do People Choose Casement Windows? - June 10, 2026
Categories: Updates