Low-E Glass in Double Glazing: RIght For Your home?

low e glass

In recent years, the supreme insulating power of Low-E glass in double glazing has continued to grow, thanks to its numerous benefits. We dive into the details here…

Low-E glass, or low emissivity glass, is a type of glass that has been treated with an invisible metallic oxide coating, designed to significantly reduce the amount of heat and ultraviolet (UV) and infrared light that can enter your home.

This innovative glass coating plays a crucial role in enhancing the thermal insulation performance of your double glazed windows giving you a comfortable and efficient living space.

What Is Low-E Glass?

When it comes to Low E glass, it’s all down to the special coating. 

By allowing the sun’s rays to pass through the glass while reflecting indoor heat back into the room, Low-E glass significantly reduces the amount of heat, ultraviolet (UV) and infrared light.

This supreme insulating power is a must when looking at improved energy efficiency, as we see when going back to basics:

Double glazing involves using two panes of glass with a gap in between, filled with air or a special gas like Argon. The insulation gap in double-glazed glass not only helps to keep the heat in, but it also helps to reduce any outdoor noise, such as traffic.

By combining Low-e glass and double glazing you’ll discover windows with even better insulation properties, resulting in a more energy-efficient home, lower energy bills, and a comfortable living environment.

Energy Efficiency and Comfort Benefits of Low E Glass

Heat Insulation

Low-E glass, significantly improves the energy efficiency of double glazed windows by controlling infrared light, which is perceived as heat.

By reflecting heat back into a building during cold months and keeping solar heat at bay in warmer seasons, this heat insulation is achieved through a microscopic coating applied to the glass, which reduces the amount of ultraviolet (UV) and infrared light penetration.

In addition to low-e glass, double-pane (dual-pane) windows offer better insulation compared to single-pane windows as the space between the panes acts as an additional layer of insulation against heat or cold. This combination ensures your double glazed windows provide superior thermal performance.

Reduced Energy Consumption

For shrewd homeowners looking to cut their heating bills, Low-e glass and double glazing can work together to reduce your building’s energy consumption.

With enhanced thermal insulation, you’ll experience less dependence on heating systems in the winter and air conditioning units during warmer months.

Energy-efficient glazing quite simply prevents heat from escaping through windows, improving a building’s overall energy efficiency. This means you can enjoy a more comfortable indoor living environment with the added benefit of lower energy bills.

Noise Reduction

In addition to temperature regulation and lower energy bills, Low-E glass in double glazing can also contribute to noise reduction within a property.

The extra layer of insulation provided by the low-emissivity coating and the gap between glass panes also absorb and minimise the transmission of external noise. This feature is particularly beneficial if you happen to live in urban areas where traffic noise and other outdoor disturbances can impact your tranquility and well-being.

In conclusion, the use of Low-E glass in double glazing offers several advantages in terms of comfort and liveability. Its ability to regulate indoor temperatures efficiently and reduce external noise makes it an ideal choice for modern, energy-efficient homes.

low E Glass = Lower Carbon Emissions

Low-E glass is a type of energy-efficient glass extensively used in double-glazed windows.

One significant benefit of Low-E glass in double glazing is its ability to lower carbon emissions. By applying a thin metallic coating to the glass surfaces, low-E glass can reflect heat back into the room, effectively reducing the need for additional heating. This helps in reducing energy consumption for heating, thereby resulting in lower carbon emissions from buildings.

Another function of Low-E glass is to allow the sun’s rays to pass through the glass when desired. This feature allows for natural heat and light to enter the building, further reducing the need for artificial heating and lighting. Sustainability

Sustainability is, no doubt, a priority for many homeowners and businesses today. Low-E glass in double glazing is a practical solution for promoting sustainable building practices. Think about it – using Low-E glass in your double glazing products contributes to their longevity and durability.

Additionally, by blocking more than 90% of ultraviolet (UV) rays, Low-E glass can prevent damage to furniture, flooring and window treatments.  

This groundbreaking technology clearly contributes to a more comfortable and healthier indoor environment. By reducing drafts and cold spots, double-glazed windows with low-E glass create a more stable and consistent interior temperature, thus promoting overall well-being for you and your family.

Low E Glass = Reduced Heating & Cooling Bills

As you can see, Low-e glass is an excellent choice for improving the energy efficiency of your home.

By installing windows containing low-e glass in energy-efficient double or triple glazed units, you can significantly lower heating and cooling bills, ultimately saving you money. In fact, Low-E glass can reduce energy use by as much as 30-50%, particularly during the hot summer months. 


One of the concerns many homeowners have when considering Low-E glass is its durability.

Soft-coat Low-E glass is actually pretty durable and can be cleaned with confidence as the coating is sealed between the glass layers, ensuring it cannot be wiped off or scratched. This makes it a long-lasting option for your home, providing you with cost-effective and energy-efficient windows over an extended period.

Low E Glass FAQ’s

How does Low-E glass improve energy efficiency?

Low-E glass, or low-emissivity glass, is designed to improve the energy efficiency of your home by reducing heat transfer. It has a thin, transparent coating that reflects heat while still allowing natural light to pass through. In winter, Low-E glass helps to keep the warmth inside your home by reflecting the heat back inside, and in summer, it prevents the sun’s heat from entering your home, reducing the need for air conditioning.

Is Low-E glass cost-effective?

Yes, Low-E glass can be a cost-effective solution for homeowners. While the initial investment might be higher than regular glass, the long-term savings on energy bills can offset this cost. By reducing heat loss and maintaining a more stable indoor temperature, Low-E glass can save you money on your heating and cooling bills.

What’s the difference between Low-E and clear glass?

The main difference between Low-E and clear glass is the low-emissivity coating applied to Low-E glass. This thin layer reflects heat, improving insulation and energy efficiency. Clear glass, on the other hand, does not have this coating, which makes it less efficient at regulating temperatures within your home.

How does Low-E glass reduce heat transfer?

Low-E glass reduces heat transfer by reflecting the heat instead of absorbing it. The low-emissivity coating minimises heat transfer between the interior and exterior of your home, improving your home’s insulation and energy efficiency.

Do Low-E windows offer noise reduction?

While Low-E glass primarily focuses on improving energy efficiency by reducing heat transfer, it can also provide some level of noise reduction. Standard double-glazing windows offer a degree of noise reduction, which can be further enhanced by incorporating Low-E coatings. However, specialised acoustic glass products must be considered for optimal noise reduction.

Can Low-E glass improve UV protection?

Yes, Low-E glass can help to reduce the amount of harmful ultraviolet (UV) rays entering your home. The low-emissivity coating on Low-E glass can filter out UV rays which not only helps to protect your skin from the sun’s harmful effects but also prevents fading of your furniture, carpets, and curtains.

There’s no doubt that this incredible glazing solution earned its name as a ‘technical breakthrough’ in the late 1980’s. 

With its many benefits, energy saving properties, durability and sustainability this innovative design is clearly here to stay. If you’re looking to enhance your home while reducing your impact on the environment, look no further than Low-e glass.

Matt James
Matt James

Hi, Matt here! I started out almost 20 years ago as a teenager working in the family business fitting doors, windows and conservatories. I now run this website to share the best tips and advice for anyone looking to get a good deal on double glazing.

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