Initially developed in Japan by Panasonic™ and perfected by our trusted supplier LandVac™, vacuum glazing is a breakthrough in glass technology. It consists of two bonded toughened glass sheets, leaving a minute 0.3mm vacuum gap. Air is then evacuated, and the unit is sealed using advanced techniques to maintain the vacuum. Micro-pillars, nearly invisible to the eye, keep the panes apart under vacuum pressure, ensuring optimal insulation and strength.
Vacuum glazing takes advantage of vacuum principles to provide superior insulation. In traditional materials, heat and sound are transferred through particles, such as air or water, by conduction and convection. However, there are no particles in a vacuum, so heat and sound can’t travel in the usual way. This drastically reduces both heat loss and noise transmission.
The concept behind vacuum glazing is like that of a thermos flask. Invented by Professor James Dewar in 1892, the Dewar flask uses a double-glass layer with the air between them removed to create a vacuum. This idea of eliminating air to block thermal transfer laid the foundation for modern vacuum glazing technology.
Like the thermos, vacuum glazing relies on a vacuum to prevent heat from escaping and reduce sound. This unique design gives vacuum glass its outstanding thermal and acoustic performance – far exceeding the capabilities of traditional double or triple glazing.
With its ultra-thin profile, vacuum glass maintains the traditional appearance of single glazing, ideally suited for heritage buildings and conservation areas. There are no visible spacer bars or distracting reflections typical in double glazing, which means preserving your home’s character while providing state-of-the-art performance.
Experience year-round comfort with vacuum glazing. Its exceptional thermal performance – 2 to 4 times more efficient than double or triple glazing and up to 10 times better than single glazing – ensures your home stays warm in winter and cool in summer.
Enjoy a quieter, more tranquil home with vacuum insulated glass. Offering outstanding noise reduction, it eliminates the need for bulky triple glazing or costly laminated acoustic glass, keeping your living spaces serene and peaceful.
We use vacuum glass made by LandVac™, which pioneered the use of toughened (tempered) glass in vacuum insulated glazing. All LandVac™ glass is toughened safety glass.
LandVac™ vacuum glass is built to last, with a robust, bonded construction using toughened glass throughout. Its lifespan far exceeds that of traditional glazing, and with a market-leading 15-year warranty, you can be confident that your investment is protected.
With a centre-pane U-value of just 0.4W/m²K, vacuum glazing reduces energy consumption and CO2 emissions, lowering your bills and environmental impact. Lightweight and fully recyclable, it uses fewer materials and avoids energy-intensive noble gases like Argon, Krypton, or Xenon, making it one of the most sustainable glazing options.
Glass Type
Overall
Thickness
Energy
U-Values
Accoustic
Reduction (RW)
Estimated
Lifespan
Single Glazing
4mm
Overall thickness
5.8
Energy U-Values
25db
Accoustic Reduction (RW)
25+ Years
Estimated lifespan
11-16mm
Overall thickness
1.2 – 1.9
Energy U-Values
31db
Accoustic Reduction (RW)
1 – 10 Years
Estimated lifespan
Double Glazing
24mm
Overall thickness
1.2 – 1.9
Energy U-Values
31db
Accoustic Reduction (RW)
10 – 25 Years
Estimated lifespan
Triple Glazing
38 – 48mm
Overall thickness
0.7 – 1.0
Energy U-Values
35db
Accoustic Reduction (RW)
10 – 25 Years
Estimated lifespan
Heritage Vacuum Glazing
8.3mm
Overall thickness
0.4
Energy U-Values
36db
Accoustic Reduction (RW)
25+ Years
Estimated lifespan
Landvac Optimum Vacuum Glazing
25.1mm
Overall thickness
0.4
Energy U-Values
41db
Accoustic Reduction (RW)
10 – 25 Years
Estimated lifespan
We’ve created two product ranges with vacuum glass:
The Vacuum Heritage Range – The ideal solution for listed buildings or properties in conservation areas.
The Vacuum Pinnacle Range – Crafted to meet the highest standards of performance for the most energy-conscious homes.
Our Vacuum Heritage Range brings 21st-century glass technology to historic buildings, offering exceptional thermal efficiency that traditional slimline glazing simply cannot achieve. Specifically designed for heritage and conservation properties, this range strikes the perfect balance between preserving the aesthetics of your home and meeting modern energy efficiency standards.
Our Vacuum Heritage windows replicate the look and feel of traditional single glazed windows while delivering unprecedented levels of thermal and acoustic performance. Thanks to a unique fusion of Sashed’s time-honoured joinery craftsmanship and LandVac™ Enhance Heritage 8.3mm vacuum glazing, you get the best of both worlds: the classic charm of period windows combined with modern-day durability, low maintenance, and sustainability.
The Vacuum Heritage Range offers a genuine solution for maintaining the architectural integrity of your historic property without compromising on performance.
The Vacuum Pinnacle Range from Sashed is the ultimate choice for those seeking unparalleled energy efficiency. Designed to meet the rigorous standards of a passive house, this collection represents the very best of window innovation. The Vacuum Pinnacle Range features cutting-edge, high-performance glazing to ensure your home achieves the highest levels of thermal insulation.
The LandVac™ Optimum glazing unit is at the heart of this range, featuring an innovative combination of vacuum insulation and laminated glass.
The result? A window system with an impressively low U-value of 0.79W/m²K, significantly improving thermal performance over standard double glazing.
At Sashed, we’ve selected LandVac™ as our exclusive supplier of vacuum insulated glass because of their unmatched innovation, quality, and performance.
LandVac™, developed by LandGlass Technology Co., Ltd, is at the forefront of vacuum glazing technology. Their R&D team of nearly 100 engineers and scientists has spent over eight years perfecting the process of creating fully toughened (tempered) vacuum glass, overcoming the long-held belief that it couldn’t be tempered. This dedication has resulted in a product that is not only groundbreaking but also incredibly reliable and durable.
Its unique construction sets LandVac™ apart from other vacuum glass on the market. By using two pieces of toughened glass on either side of the vacuum, LandVac™ ensures superior safety and strength. This design reduces the need for micro-pillars – 8 to 10 times fewer than other brands – making it more efficient without compromising performance.
Are you a homeowner, self-builder, interior designer, or architect looking for vacuum glass for a listed building, house renovation, new build, or commercial project?
We would love to discuss your project and help create the right solution for your needs!
We use LandVac™ because it is the market leader and is superior in several important ways:
Vacuum glass units are currently only commercially available in standard clear glass. However, we can integrate vacuum glass with other types of glass to provide the complete range of glass options offered with traditional double glazing, forming a sealed unit. For instance, we can incorporate vacuum glass on the interior side of the frame and obscured glass on the exterior, mirroring the configuration of a traditional double glazing unit. Alternatively, we can apply a frosted film to vacuum glass.
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