Three times better insulation - without window frame replacement
With the introduction of vacuum glass, a revolutionary step has been taken in the field of insulating glass. Where previously more glass layers and noble gas were needed for better insulation, vacuum glass shows that it can be done differently. With an ultra-thin vacuum cavity, you achieve an insulation value that is up to three times better than HR++ – in glass that is only 8.3 mm thick.
With BENGglas you choose:
- Maximum insulation (up to U=0.35)– three times better than HR++ and two times better than triple glazing
- A lifespan of up to 50 years – almost twice as long as standard insulating glass
- Installation in existing frames – saves material and prevents extensive renovation
- 30% less material than triple glazing – lighter, more sustainable, and less transport needed
- A direct contribution to sustainability – lower energy costs and a significant CO₂ reduction
An innovation that is among the most impactful, yet often underestimated solutions for the energy transition.
Everything in one convenient overview? Download our brochure
The technology behind vacuum glass
Vacuum glass consists of two glass panes, separated by tiny spacers. In between is a space with high vacuum, which results in minimal heat loss through conduction and convection. Add a heat-reflective coating, and thermal radiation also stands no chance. It sounds simple, but there's serious technology behind it. Each glass pane contains about 452 patents – and you can see that in the performance.
The spacers ensure that the pressure on the glass during the vacuum process is evenly distributed. At BENGglas, the number of spacers is small, and they are made in non-reflective anthracite. This way, they are hardly visible; even with a low sun.
Note: During the condensation season, a subtle 'dam' pattern may temporarily appear around the spacers.
The best insulation glass in the world!
BENGglas is the exclusive distributor of the entire LandVac range – the pioneer in vacuum glass, with a state-of-the-art factory and a production capacity of no less than 230,000 m² of vacuum glass per year. This ensures you get the very best vacuum glass and a factory warranty of up to 20 years.
- The best insulation value available: up to U=0.35
- Standard tempered and ultra-thin (from 8.3 mm)
- Unique titanium technology – for extra strength and a lifespan of up to 50 years
- Proven quality – supported by European test reports (IFT Rosenheim, 2025)
- Subtle spacers – few in number and made in non-reflective anthracite
- 100% quality control – every pane is extensively tested after production
Differences at a glance
| BENGglas | Double glazing | Triple glazing | |
|---|---|---|---|
|
U-value (W/m²K) |
>0,35 | 1,10 | 0,70 |
|
Thickness from (mm) |
8,3 | 21 | 38 |
| Tempered | Standard | Optional | Optional |
|
Light Transmission (LTA in %) |
> 83 | 80 | 65 |
|
Solar Heat Gain (G-value) |
>0,33 | 0,76 | 0,52 |
|
Sound Insulation Rw (C;Ctr) dB |
36 (-2;-3) | 31 (-1;-4) | 33 (-2;-6) |
|
Expected lifespan (years) U-value degradation? |
50 No degradation |
20 - 25 With degradation |
30 With degradation |
| BENGglas Extra clear | BENGglas Single Coated | BENGglas Double Coated | BENGglas Triple Coated | BENGglas Monu | BENGglas Monu Restover | |
|---|---|---|---|---|---|---|
|
U-value (W/m²K) |
0,50 | 0,40 | 0,40 | 0,35 | 0,50 | 0,50 |
| Thickness from (mm) | 8,3 | 8,3 | 8,3 | 8,3 | 8,3 | 13,06 |
| Light Transmission (LTA %) | 83 | 78 | 70 | 68 | 83 | 83 |
| Solar Heat Gain (G) | 0,68 | 0,58 | 0,39 | 0,33 | 0,68 | 0,68 |
| Sound Insulation Rw (C;Ctr) dB | 36 (-2;-3) | 36 (-2;-3) | 36 (-2;-3) | 36 (-2;-3) | 36 | 39 |
| Properties |
Extra clear Extra thermal Extra light |
Clear Color-neutral glass |
Solar control glass |
Best U-value Extra solar control Commercial buildling |
Heritage glass (light drawn) | Heritage glass (strongly drawn) |
From patent to pioneer: the development of vacuum glass
A century of innovation, with BENGglas as the exclusive partner of LandVac
Vacuum glass was first described in a German patent from 1913. However, it took until 1996 for the first commercial product to hit the market. Since then, much has changed.
In 2016, after eight years of intensive research and testing, LandGlass launched LandVac®: the first fully tempered vacuum glass that independently meets the standards for safety glass, without additional lamination. This marked the beginning of a series of innovations and international recognitions.
- 2017: LandVac received various certifications from international bodies, including ISO9001, SGCC (US), and UL, being the only vacuum glass in the world with this safety status.
- 2020: Awarded the official China Green Product Certification – a recognition for environmentally friendly and healthy products.
- 2024: Launch of a new generation of titanium vacuum glass with cylindrical tempering technology. With multiple patents, this means a major step forward in quality and performance.
- In the same year, a new corporate identity and logo were also presented – a visual reflection of LandGlass's innovative and future-oriented course.
BENGglas: exclusive LandVac partner in Europe
BENGglas was founded in 2020 as an initiative of Giga-Glas and is the only official importer of LandVac in the Netherlands, Belgium, Germany, and several other European countries. Together, we bring the power of titanium vacuum glass to homes, monuments, and projects across Europe – maintaining appearance and maximizing energy performance.
The lower the U-value, the better the insulation
The insulation value of glass – expressed in a U-value – indicates how much heat a glass construction loses. The lower the U-value, the better the glass insulates.
Vacuum glass from BENGglas achieves a U-value of up to 0.35. This makes this vacuum glass more than twice as insulating as HR+++ glass (U=0.70) and almost three times as good as HR++ glass (U=1.10) – while being much thinner and fitting into existing frames.
An expected lifespan of up to 50 years
The expected lifespan of vacuum glass is 50 years – with retention of insulation value.
That is considerably longer than traditional insulation glass such as HR++ or HR+++, which usually lasts between 20 and 40 years. Additionally, the insulation value often decreases due to gas leakage or contamination in the frame.
Vacuum glass is still relatively young, so how do we know it lasts so long?
Thanks to reliable laboratory tests. In special test setups, decades of weather, wind, and UV radiation are simulated. Based on that, we can confidently say: vacuum glass continues to perform for a long time – without compromising on insulation.
Up to 20 years warranty thanks to an unprecedented long lifespan
At BENGglas, we think ahead. Thanks to the expected lifespan of no less than 50 years, we offer you up to 20 years warranty— that's twice as long as with HR++ or HR+++ glass.
Our warranty covers the free replacement of your BENGglas pane(s) if they lose their insulating function within the warranty period. This way, you can be sure you're covered for years to come.
Want to know more?
Check the full warranty terms under ''documentation''.
A fair price is more than just the price per square meter
The price of vacuum glass is slightly higher than traditional insulating glass, but that doesn't tell the whole story. With BENGglas, you also save on:
- new frames (which are often needed with HR+++)
- extra hinges and locks
- your energy bill
- and your energy label - which results in a higher property value. Thus, the effective payback period is often 0 years.
Additionally, there are attractive subsidies on vacuum glass in the Netherlands, which can be as high as €46 per m².
Our consumer advice price?
As a guideline, you can expect a price starting at €285 per m² (excluding VAT, transport, and installation).
The final costs depend on your specific situation: type of frame, glass choice (e.g., laminated or sun-resistant), and any additional wishes such as painting or finishing.
Want to know for sure what your project will cost?
Then fill in the quotation form. You will receive a non-binding proposal from three recognized BENGglas dealers near you. This way, you know exactly what to expect - without surprises afterward.
Take advantage of attractive schemes for your home or business
Sustain your home with BENG glass? Then you are eligible for a nice compensation through the Investment Subsidy for Sustainable Energy and Energy Saving (ISDE). These are the amounts you can get back:
- €25 per m² when you only replace the glass with BENG glass (report code: KA18780)
- €111 per m² if you also replace your window frames (report code: depending on composition)
- €46 per m² when making a national monument more sustainable with BENG glass
And it gets even more interesting: if you combine the glass with another insulation measure – such as roof or floor insulation – then the subsidy amount doubles.
Are you unsure whether your home is a national monument? Check it on RVO.nl
Up to €16 per m² back when replacing your glass
Are you having the old glass in your home or building replaced with BENGglas? Then you can take advantage of the Flemish renovation premium. You will receive no less than €16 per m² back – a nice support in the process of making your property more sustainable.
This is how to apply:
- Have BENGglas installed by a recognized contractor or BENGglas dealer
- Apply for your premium via the online portal of Vlaanderen.be
- Use the contractor's installation certificate with your application
It's arranged in a few steps – and you save immediately.
Frequently asked questions
What exactly is laminated vacuum glass?
Laminated BENGglas offers enormous possibilities: you can choose from three types of films (EVA, PVB, or SentryGlas Plus) and an almost unlimited range of counterpanes.
All types of films ensure that no shards come loose in case of breakage. But it doesn't stop there – you benefit from many more smart advantages. Each type of film has unique properties, giving the pane – in addition to the superior insulation value of BENGglas – many extras, such as:
- fall-through safety – safe at height, for all building functions
- burglary resistance – not easy to get through
- extra sound insulation – from -36 dB to -39 dB or even more, noticeably quieter
- better UV protection – your furniture stays beautiful longer
- colors and patterned glass types – your pane completely changes appearance
You can completely decide how to compose your layered pane. Think of patterned glass for a unique appearance, or extra films for maximum safety. Let us know what you are looking for – we are happy to think along with you.
What is the history of vacuum glass?
Vacuum glass was first patented in Germany in 1913. However, it took until 1996 for the first commercial products to appear — originating from Japan and South Korea. These early versions were still limited in use and not suitable for broader applications in construction.
The real breakthrough came in 2016, when LandGlass became the first in the world to market a fully tempered, tested, and certified vacuum glass: LandVac®. Since then, the technology has rapidly evolved — resulting in high-quality, reliable, and durable titanium vacuum glass.
In 2019, Fineo (from AGC) followed, intended for lighter applications. But those who choose maximum performance in terms of insulation, safety, and durability opt for LandVac.
BENGglas is the exclusive importer of LandVac in the Netherlands, Belgium, and several other European countries.
What is the advantage of titanium vacuum glass?
In vacuum glass, everything revolves around innovation – and at BENGglas, we are leading the way!
With our exclusive Titanium Vacuum Glass technology, we set a new standard that you won't find anywhere else.
This unique technology provides:
- 70% less heat loss thanks to titanium spacers
- Longer lifespan with titanium getters
- 90% less stress and 40% more bending strength due to flexible titanium sealing
- Extra resistance to corrosion and wear, even under harsh conditions
- Lower energy consumption, all year round
In short: when you choose titanium, you choose maximum lifespan, strength, and insulation!
Want to know more? Check out all the details and benefits on our website
Can I fit laminated vacuum glass in my existing frames?
In most cases, yes. Laminated BENGglas is available from just 13.06 mm thick, which is thinner than triple glazing. Not sure if it will fit? We can help you, or put you in touch with a certified installer in your area.
What are spacers and why are they always in vacuum glass?
If you have ever looked closely at vacuum glass, you might see them: small dots between the two glass panes. We call them spacers.
Spacers are tiny supports in the vacuum cavity (the space between the glass panes). They ensure that the glass layers are not drawn towards each other when the air between them is removed. Without these supports, the glass could literally break due to the pressure.
At BENGglas, the spacers are:
- Placed only every 55 mm – which is much less than other brands of vacuum glass.
- Anthracite in color, making them much less noticeable than clear or silver-colored variants that reflect light.
Advantage for you?
A beautiful, calm, and unobstructed view through your windows, without disturbing reflections or a 'grid'-like effect that you sometimes see with other types of vacuum glass.
Note: during the condensation season, you may notice a kind of 'dam' pattern on the glass. This means that condensation forms everywhere on the pane, except around the spacers. This is because these small supports conduct heat slightly better, causing moisture on the outside to set less quickly.
Fortunately, there are special anti-condensation coatings available that can help reduce this effect, so your windows continue to look beautiful for longer — even in humid conditions.
BENGglas Extra Clear
BENGglas Extra Clear is the clearest product in our range—almost as transparent as single glazing, yet with an impressive U‑value of 0.50. Ideal for anyone looking to maximize energy savings while enjoying extra natural daylight and free solar heat
- Top insulation (U=0.50)
- Fits in the existing frames
- Extra clear vacuum glass
- Extra light and solar heat (LTA=83, G=0.68)
- U-value tested by IFT Rosenheim (2025)
BENGglas Single Coated
BENGglas Single Coated combines the color-neutral appearance of double glazing with a superior insulation value of 0.40 (U).
- Maximum insulation (U=0.40)
- Color-neutral vacuum glass
- Natural light incidence (LTA=78%)
- Fits in the existing frames
- U-value tested by IFT Rosenheim (2025)
BENGglas Double Coated
BENGglas Double Coated keeps the heat inside with the high insulation value of 0.40 (U). At the same time, a smart solar control coating ensures that the sun's heat stays outside. This way, you always enjoy a cool and comfortable home — and an energy bill that remains low, even on the hottest and coldest days.
- Solar control glass (G=0.39)
- Maximum insulation (U=0.40)
- Fits in the existing frames
- U-value tested by IFT Rosenheim (2025)
BENGglas Triple Coated
BENGglas Triple Coated offers maximum sun protection and the best insulation value in the world: U=0.35! For those who want maximum energy efficiency and sun protection in commercial construction.
- The best insulation value worldwide (U=0.35)
- Highly sun-shielding glass (G=0.33)
- Fits in the existing frames
- U-value tested by IFT Rosenheim (2025)
BENGglas Monu
BENGglas Monu combines extra clear glass with the insulation power of vacuum glass (U=0.50). Thanks to the small thickness of only 8.3 mm and the subtly wavy surface, it is the solution for monuments where the original frames must be preserved.
- Top insulation (U=0.50)
- Extra clear vacuum glass
- Extra light and solar warmth (LTA=83, G=0.68)
- Fits in the existing frames
- The best choice for monumental renovations
- U-value tested by IFT Rosenheim (2025)
BENGglas Monu Restover
BENGglas Monu Restover combines monument glass (Restover) with the insulating power of vacuum glass (U=0.50). The characteristic strong curvature in monument glass retains the authentic appearance that is so typical of historic buildings. For the first time, there is a glass solution that preserves heritage sustainably.
- Top insulation (U=0.50)
- Extra clear vacuum glass
- For extra daylight and solar warmth (LTA=83%, G=0.68)
- Laminated glass: 13.06 mm
- Monument glass: strongly wavy surface (Restover glass)
- U-value tested by IFT Rosenheim (2025)
BENGglas Sun
With BENGglas SUN, you not only save on your energy costs thanks to the extremely low U-value of 0.50 – you also generate your own energy! Thanks to the integrated solar cells, this glass is ideal for facades and roof glazing in sunny locations.
- Top insulation (U=0.50)
- Generating energy (Up to 140 Wp/m²)
- No degradation of the U-value with horizontal placement
- Lightweight and slim (> 14 mm)
- U-value tested by IFT Rosenheim (2025)
BENGglas Solar Control
BENGglas Solar Control offers the best sun protection within the BENGglas range – with an impressively low G-value of 0.29. Ideal for commercial buildings where you want to keep solar heat out and achieve maximum energy efficiency.
- Top insulation (U=0.50)
- Maximum sun protection (G=0.29)
- Fits in the existing frames
- U-value tested by TÜV Rheinland (2025)
Find a certified installer
BENGglas has an extensive network of over 150 certified installers across Europe, specializing in vacuum glass installations. This way, you’re always assured of a professional close to home! Want to get the best deal easily? Fill out our quote form and receive three competitive offers from the three nearest BENGglas dealers in your area!
References
Are you curious about where vacuum glass is already being used? Check out our references and discover how BENGglas is applied in various projects – from monumental buildings and protected heritage to sustainable new construction, canal houses, and sleek offices.
In this way, we help contribute to energy-efficient buildings with less CO₂ emissions, pane by pane.
BENGglas in ‘The Art of Living’ with the sustainability of a 100-year-old building
Sustainability of modern office building
Villa renovated with BENG glass
