Double or triple glazed windows and doors

Double glazing is today the most popular form of glazing. In double glazing, the two glass panes are inserted in parallel separated by a cavity filled with gas which has an insulating effect.

See technical information on double glazed windows and patio doors

Triple glazed windows and doors simply use three panes of glass within a sealed frame, instead of two. So, although glass conducts heat fairly well, triple glazing reduces this heat loss using the layers of air/gas in between the panes making it a lot harder for the heat to escape.

See technical information on triple glazed windows and patio doors

Glazing’s energy efficiency can also be improved by opting for low emissivity glass (aka Low-E glass). Low-E glass has an invisible coating that dramatically reduces heat transfer and reflects interior heat into the room. Low-E glass can make a big difference to a window’s thermal performance, whether it’s double or triple glazed.

Read more about double and triple glazing in our blog

In 2025, the UK government will introduce a Future Homes Standard for new build homes to be future-proofed with low carbon heating and world leading levels of energy efficiency. When the new standard will come into force, the current maximum U-value for a window will drop to 0.8W/m2K.

This lower U-value target is easily met by triple glazing but not by double glazing. As a result, homeowners are already starting to choose triple glazing for their homes, a trend which will accelerate as we get closer to the 2025 deadline.

We believe that both double glazing and triple glazing have their pro's and con's. The choice between the two depends on a number of factors such as your home’s level of insulation, the orientation of each room to the sun and your budget. We usually suggest a mix of the two, in order to achieve the best thermal efficiency rating while keeping the cost low. To learn more about your options, please read our blog

If you are considering installing triple glazing windows in your home, we strongly suggest to ask a professional to do it for you. Installing triple glazing windows can help you reducing your energy bills , and improve your house indoor climate, but a poor installation can affect their efficiency and cause problems with the windows themselves. However, if you feel comfortable enough to install the windows yourself, we provide videos to guide you step by step. Learn more

Triple glazing can help to combat the heat loss during the cold winter months, it does the same job as double glazing, but better!

A triple glazed window is, however, more expensive than double glazing, costing roughly 10-20% more . To receive some advice and a no obligation quote for your project, please tell us about your project and get in touch with one of our distributors.

Choosing between double and triple glazing depends on factors like your home’s insulation level, environmental impact, and budget. Understanding the construction of modern windows can help make this decision easier.

Glass and Gas Keep You Warm

Both double and triple glazing feature glass panes set in parallel, with a cavity filled with argon gas to provide insulation. Triple glazing has an additional pane and cavity, offering enhanced insulation. All VELFAC windows include energy-efficient coatings for extra comfort. Argon gas is clear, effective, and entirely safe, making it ideal for insulating your home.

When planning home improvements, it’s wise to consider return on investment, as the right windows can lower heating bills and improve comfort. Triple glazing offers better insulation than double glazing, potentially cutting heating costs further. However, for poorly insulated homes, upgrading windows alone may not have the desired effect, as heat could escape through inadequately insulated walls or roofs.

In well-insulated homes, however, windows become a key element in energy efficiency, making triple glazing a worthwhile investment. For homes with less insulation, double glazing provides the best balance of price and performance before you need to consider other costly upgrades to walls and roofs.

Triple glazing might seem like an upgrade, but each glazing option offers distinct advantages. In colder, windier areas, triple glazing enhances insulation and indoor comfort.

Double glazing, while less insulated, allows more sunlight and free solar heat into the home, making it ideal for South, East or West-facing windows. Triple glazing, in contrast, retains more indoor heat and provides a stable temperature, allowing you to sit comfortably by the window regardless of outdoor conditions.

Glazing Choice and Energy Performance

Your choice of glazing greatly impacts window energy performance. Triple glazing provides superior insulation, particularly suited for shaded areas where heat retention is key. Double glazing allows more solar gain, making it ideal for windows exposed to sunlight, such as South, East or West-facing windows.

You can also consider a mix of double and triple-glazing to appropriate locations, providing the best all round solution to your project. As VELFAC double and triple-glazed windows look identical, there is no visual impact regardless of the combination used.

Discover more about our glass and accessories here.

VELFAC windows and doors are made to order, allowing you to tailor your glazing to your home’s specific needs. With a wide variety of shapes, sizes, frame colours, and opening functions, VELFAC gives you the freedom to create unique architectural statements and customise your windows to match your style.

See the key features of our windows and doors here.

VELFAC offers a minimum 10-year warranty on windows and a 5-year warranty on casement, sliding, and external doors. Our expert team is here to help you select the perfect windows for your needs. Visit our showroom to experience the quality of VELFAC products, or reach out to a VELFAC distributor for guidance.

Contact a VELFAC distributor here.