When it comes to improving your home's energy efficiency and comfort, glazing solutions play a major role. Two of the most common options are double glazing and secondary glazing, but what exactly is the difference between the two?
At NRG Glass, we specialise in secondary glazing solutions for homes and listed buildings across Essex, Suffolk, Hertfordshire and London. In this article, we explain the key differences to help you make an informed decision.
What is Double Glazing and How Does it Work?
Double glazing consists of two panes of glass separated by a sealed air or gas-filled space. This gap acts as an insulator, reducing heat loss and helping to keep your home warmer in the winter and cooler in the summer. Double-glazed windows are fitted as a single unit and require replacing the existing window.
Benefits of Double Glazing
Thermal insulation
Effective noise reduction
Modern, streamlined appearance
However, installing double glazing can be expensive. It may also not be suitable for listed properties or conservation areas, where preserving the original window structure is important. Secondary glazing can be a suitable alternative, offering insulation benefits without altering the property's exterior. It is important to always check with your local authority before making any changes.
What Is Secondary Glazing and How Does it Work?
Secondary glazing involves installing a second, discreet pane of glass on the inside of your existing window. Unlike double glazing, it does not alter or remove the original window, making it ideal for heritage homes and period properties.
A small air pocket is created between the two pieces of glass, acting as an insulating barrier. This slows down heat transfer, making homes warmer in winter and cooler in summer.
Benefits of Secondary Glazing
Here at NRG Glass, our solutions can help reduce condensation by up to 95%! This eliminates rising mould issues within your home.
Secondary glazing can improve the thermal insulation of a window by up to 70%. This will reflect the heat back into the room, making secondary glazing insulation an energy-efficient choice for your home.
Secondary glazing can reduce noise by up to 75%. Whether you're trying to reduce or retain noise, soundproofing is the ideal solution.
As outlined by Historic England’s publication on Energy Efficiency, a second window provides an additional barrier to entry, providing improved security. This is especially suitable when a historic building's purpose changes and increased security is needed.
UV Protection
At NRG Glass, we can also glaze the secondary glazing with 6.4mm laminated glass. This will block 99% of UV rays coming into your home.
Double vs Secondary - What Will It Be?
Making the decision between double and secondary glazing depends entirely on your property's needs, budget and planning constraints. Both glazing options offer valuable benefits for improving your home's energy efficiency, insulation and comfort.
If you live in a newer property and are seeking a modern window upgrade, double glazing might be the best option for you. However, if you own a heritage property or want to preserve your original windows, secondary glazing offers a smart, flexible alternative.
Another important factor to consider is cost. The Federation of Master Builders, the UK's largest trade association for the construction industry, have outlined the following in regards to average cost:
Secondary glazing - around £200-£550 per window
Double glazing - around £520-£2800 per window
These figures highlight a significant price difference between the two options. Double glazing typically involves higher upfront cost due to full window replacement, whereas secondary glazing is a more budget-friendly solution as the original window remains.
Why Choose NRG Glass for your Secondary Glazing
Here at NRG Glass, we specialise in bespoke secondary glazing systems without compromising the appearance of your home. Secondary glazing is a practical solution whether you're looking to reduce your heating bills or block out traffic noise.
We are also proud members of FairTrades & Trust Mark, giving our customers peace of mind that FairTrades & Trust Mark members have successfully completed a rigorous vetting procedure.
Ready to upgrade your windows without replacing them? For more information or to enquire about our services, get in touch with our team.
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