Application_Renovation Application_Renovation
  • ABOUT BENGglas
What is the advantage of tempered glass?

BENGglas is the only vacuum glass in the world that is fully tempered. The advantages of this are that it is 5 x stronger than (ordinary) untempered glass, there is no chance of thermal breakage and it is injury-proof.

Are ventilation grilles available for this thin glass?

Yes, the Duco company has a suitable type: the GlasMax ZR. More information can be found here .

How do I get a quote (private)?

Under the heading "dealers " you will find an overview of all BENGglas dealers in your area. After you have approached one of these dealers, the dealer will come to you and provide you with a quote. This quote includes the glass and the required installation. Any necessary finishes, such as painting, can also be included. This way, a total solution is always offered.

All BENGglas dealers have BENGglas sample windows, so you can make an informed decision. It is also possible to visit the BENGglas appointment

Is there no dealer near you?
Then ask your local glazier to contact BENGglas via

Are you an architect, project developer or otherwise professionally active in the property renovation market?

Would you like to receive more in-depth technical information, a project price (indication) or samples? Please contact us by telephone on 013-5342226 or send an email to . We would be happy to drop by or plan a visit to our showroom in Goirle.

What is the history of glass?

Glass was invented accidentally by heating glass grains in sand to create glass beads. These pearls were originally worked for beads, but later crafted into larger shapes from 1,500 BC. The Romans invented the casting process around the first century AD and made it possible to produce the first "flat glass". The glass was not really transparent. And due to the lack of lime, these windows were still very vulnerable.

Around the Middle Ages (approximately 1,000 AD), production techniques were significantly improved and it became possible to produce clear glass using coal and advanced furnaces.
As a result, quality increased and the existence of the first large glass concerns began.

In the following centuries, the techniques and compositions of glass were greatly improved and the possibilities with glass are now endless.

What types of insulating glass are there?

There are different types of insulating glass available, each with its own properties and applications. Some of the most common types of insulating glass are:

  1. Double glazing or Thermopane: This is the most common type of insulating glass and consists of two glass panels with an air space (cavity) between them. The air space may be filled with air or an insulating gas such as argon or krypton. It is commonly used in homes and commercial buildings. Air conducts better than noble gas, which does not improve insulation performance. Small cracks can develop in the edge seal, causing the insulation performance to decrease over the years.
  2. High-efficiency glass: HR++ and HR+++ (also called triple glass) is double glazing with a coating and insulating glass between the glass plates. This achieves better insulation. HR+++ (also called triple glass) achieves better insulation performance than HR++ because the construction consists of three glass plates. Small cracks can develop in the edge seal of both types, causing the insulation performance to decrease over the years.
  3. Vacuum glass : This type of glass consists of two thin layers of glass that are hermetically sealed so that virtually no heat loss can occur. In a vacuum, virtually no (heat) conduction can take place. What is heated indoors retains its heat. The heat from outside also stays outside. It offers the best thermal insulation of all types of insulating glass and retains its insulation value compared to traditional insulating glass due to the advanced edge seal.

The choice of the right type of insulating glass depends on the specific needs. Additional functions can also be assigned to the glass with additional films or coatings. Consider functions such as: sun-resistant, fire-resistant, burglar-resistant or, for example, extra sound insulating. Such applications are possible with BENGglas . Complete the contact form to request the options.

How long does insulating glass last?

Traditional insulating glass (HR++, HR or triple glass) has a lifespan of approximately 15 to 30 years, but gradually loses its insulation value due to cracks in the sealing edge.
For comparison: the expected lifespan of BENGglas is between 25 -50 years (or even longer), while retaining its insulation value.

It is important to note that the lifespan of insulating glass can vary depending on conditions and maintenance.
Regular maintenance and careful installation can extend the life of all types of insulating glass. BENGglas has a warranty period of 15 years BENGglas Traditional insulating glass has a warranty period of 10 years.

What is vacuum glass?

Vacuum glass is an extremely thin type of insulating glass in which two glass plates of at least 4 millimeters are separated by a vacuum cavity of at least 0.15 millimeters. The total thickness of the glass package is 8.15 mm. Despite this small thickness, Ug values ​​of no less than 0.40 W/m2K are achieved.

To distribute the pressure of the glass over the glass surface and prevent the two glass plates from touching each other, micro spacers are evenly distributed over the entire glass surface. These spacers are located every 40 to 60 mm (depending on the type) and are barely visible from 2-3 meters.

Because the glass plates are hermetically sealed, there is minimal heat or sound transmission and optimal insulation can be provided.

Some important features and benefits of vacuum glass are:

  1. Excellent thermal insulation: The absence of air or gas between the layers of glass significantly reduces heat conduction, making vacuum glass one of the most thermally efficient glass products. It keeps heat in in winter and heat out in summer, reducing energy consumption for heating and cooling.
  2. Thin and lightweight: Vacuum glass is thinner and lighter than HR++ or triple glass. While HR++ and triple glass are often too thick for older frames, vacuum glass almost always fits in the existing frames. This saves on new window frames, but also on the purchase of new hinges and locks, labor and time. The installation of the glass also takes much less time because it is less labor intensive due to the light weight of the glass compared to, for example, triple glazing.
  3. Improved Sound Insulation: Due to its dense construction, vacuum glass can also reduce sound transmission, resulting in a quieter indoor environment. BENGglas reduces 36 dB. In a layered version this increases to 39 dB.
  4. Condensation control: As with other insulating glass, vacuum glass helps prevent condensation on the inside of the window. Condensation can always form on the outside, but this is a sign of good insulation.
  5. Energy efficiency: The use of BENGglas contributes to reduced energy consumption and lower energy costs. BENGglas also reduces the energy requirement of a home. This allows savings in the number of solar panels or the strength of the heat pump.
What is the history of vacuum glass?

The origins of vacuum glass date back to a 1913 German patent, but it took until the mid-20th century for this innovative technology to become a reality. The debut on the commercial market did not take place until 1996, when the product first became available in the Netherlands.

BENGglas has entered the Dutch market since 2020, and its roots can be traced back to Giga-Glas! BV, an international glass wholesaler with three decades of experience. BENGglas vacuum glass has now acquired a prominent position in the insulating glass market. The organization is actively committed to accelerating the energy transition by increasing awareness of the product and charging fair prices.


How long does vacuum glass last?

The lifespan of vacuum glass has been tested and appears to be at least 25 years, while retaining its insulation value.
The glass is expected to last up to 50 years. The warranty for BENGglas is 15 years compared to what is common (10 years).

How does vacuum glass maintain its insulation value / U-value?

A leak in HR++ or Triple insulating glass occurs because the frame, which holds the glass plates together, is not airtight. This allows the noble gas to escape over time and condensation to form. The edges of vacuum glass, on the other hand, are fused together so that the vacuum remains intact. As a result, vacuum glass retains its insulation value. In contrast to HR++ or Triple glass, no degradation takes place in vacuum glass and the U-value remains at 0.40 for type BENGglas . Even if the vacuum glass is placed at an angle, there is no reduction in the insulation value.

Is condensation possible with vacuum glass?

Aged insulating glass has a high U-value (insulation value), which could cause condensation moisture to form on the inside of the glass. Because the U-value has greatly improved, condensation will only occur on the outside during the 'condensation' season. This does not have a disturbing effect and does not damage the panel.

Vacuum glass - condensation

Why are there dots or spacers in the glass?

To prevent the glass plates from being pressed against each other by the vacuum, microscopic spacers in vacuum glass are required.
BENGglas has the smallest and fewest spacers of all brands and available types of vacuum insulating glass.

Why are vacuum caps and absorption points necessary?

When you choose vacuum glass, you will always have to deal with absorption points or absorption strips. The vacuum cap can sometimes be avoided by means of special production techniques.

Where the absorption points are intended to extract moisture extract
air In the absence of the vacuum caps, the air is extracted from the corners of the vacuum glass.

The combination of both creates a vacuum so that no conduction can occur between them. Without conduction, heat remains inside and cold outside (or vice versa in summer), which ensures the best insulation value.

The number of absorption strips and points can increase as the surface area of ​​the window increases. Therefore, always consult the technical drawings of the relevant model before purchasing. It is important that these strips are neatly concealed behind the glazing beads/putty. Calculate carefully whether you have enough space for this.

Why is vacuum glass better than other insulating glass?

Vacuum glass insulates better, but also retains its U-value (insulation value) after 25 to 50 years.
Unlike other types of insulating glass, vacuum glass is airless, so no conduction can occur. This keeps heat inside and cold outside (and vice versa in the summer).

The conductivity is a lot greater with other types of insulating glass as they are processed using air or noble gas. These gases escape through the frame over time, causing other insulating glass (for example: HR ++ or Triple glass / HR +++) to lose its original insulation value over the years.

Is there a CE marking for vacuum glass?

There is still no harmonized standard requiring CE marking that includes vacuum glass. This is also not expected in the short term. Other brands of vacuum glass cannot therefore have a CE marking.

How long does BENGglas last?

BENGglas lasts longer than traditional insulating glass and maintains its U-value stable throughout its lifespan. Where the insulation value of traditional insulating glass increases after a few years.
The tested lifespan of vacuum glass is at least 25 years (while maintaining its insulation value). The expected lifespan is 50 years and the warranty on BENGglas is 15 years.

This warranty period is no less than 5 years higher than what is common within the glass industry.

Why choose BENGglas ?

Compared to traditional forms of insulating glass, BENGglas In fact, BENGglas offers, with its U-value (insulation value) of 0.40, the best insulating glass in the world.
And this investment is immediately reflected in the improvement of the energy label of your home. With this you immediately benefit from an increase in the value of your home!

BENGglas is the only brand that supplies its insulating glass with tempered glass as standard and is very competitively priced compared to regular vacuum glass. Moreover, BENGglas has fewer and smaller spacers than other brands of vacuum glass.

How do you guarantee the service life of 25 years?

By means of a lab test, conditions over a period of 25 years can be simulated. After such a test, the U-value (insulation value) was found to have been fully maintained. That is why BENGglas guarantees a lifespan of 25 years. The expected life of vacuum glass is 50 years.

What is the noise reduction?

The sound reduction of BENGglas is 36 dB. In a layered variant, this increases to 39 dB.

What thicknesses are available?

BENGglas vacuum glass starts with a thickness of 8.15 mm, increasing to 12.3 mm in total. Further thickening with insulating glass is possible. Each type of BENGglas is available in the following thicknesses:

  • 8.15-8.3mm
  • 10.15-10.3mm
  • 12.3mm

Depending on the size of the panel, it may be recommended to order your vacuum glass from BENGglas in a slightly thicker version. There is only an additional charge for vacuum glass with a thickness of 12.3 mm or more.

The following glass thicknesses should be applied based on the total surface area of ​​a single pane:

  • 8.3 mm: < 1.8 m²
  • 10.3mm: 1.8m² – 2.7m²
  • 12.3 mm: > 2.7 m²

Below are the minimum thicknesses per type of BENGglas :

  • BENGglas : 8.3 mm
  • BENGglas MAX: 8.3 mm
  • BENGglas BASIC: 8.15 mm (10.15 mm when tempered)
  • BENGglas +: 8.3 mm

If you BENGglas BASIC in a hardened version, the minimum thickness is 10.15 mm.
Type BENGglas +, BENGglas MAX and type BENGglas are tempered as standard.


Can BENGglas also be thickened?

The vacuum glass of BENGglas can be thickened to the desired glass thickness. An extra cavity including counter pane is then placed behind the BENGglas . The cavity options are 6, 9, 12, 15, 18 or 20 millimeters thick with a counter pane of 4 or 5 millimetres. The U-value (insulation value) of your vacuum insulating glass remains the same even after this thickening.

Is BENGglas possible in a layered or drawn version?

The vacuum insulating glass from BENGglas can be manufactured in a layered or drawn variant. BENGglas laminated is often used in roof glazing for extra burglary protection and sound insulation (noise reduction = 39 dB).

What are the possibilities in coatings?

Type BENGglas BASIC can only be ordered with a single coating. With BENGglas type, you can choose between a single (S.1.16) or double (D80) coating. These coatings influence the U value (insulation value), LTA% value (light entry factor) and the G value (solar entry factor). These values ​​are lower with a double coating than with a single coating. This means that you achieve a better insulation value and sun protection with a double coating.


How do I install BENGglas ?

The vacuum insulating glass from BENGglas is easy to install, comparable to installing HR++ glass. Since the coatings are applied on one side, the tactile part of the vacuum cap ( BENGglas , BENGglas +) or the absorption strip ( BENGglas BASIC, BENGglas MAX) must be mounted on the inside.

For more information, download the installation instructions and user manual.

Which kit do you recommend?

The sealant must be free of plasticizers and linseed oil.
Work must be done on a clean, dust- and grease-free painted surface.
Follow the instructions of the respective kit manufacturer.

Recommended and approved sealants for BENGglas are:

Can shaped windows also be supplied?

The vacuum insulating glass from BENGglas can be supplied in shaped panes. However, not all shapes are possible (think of circles, for example) and the options differ per type of BENGglas .

For more information, you can our overview or submit a request via .
With larger volumes, more is often possible than the overview shows. You can keep an overview for a number of diamonds in a relevant shape.

A surcharge of 50% applies to standard shaped windows (archs or sloping edges). Provided you request a special shape (e.g. a triangle) and manual work is required to realize your shape, this percentage can increase.





Can BENGglas be used in all types of frames?

Yes. BENGglas fits perfectly in old window frames because it is so thin. But the vacuum glass from BENGglas is also an excellent product for new construction with wooden, plastic or aluminum frames.

What are the minimum and maximum sizes?

The smallest size BENGglas is 300 x 300 mm. Smaller is possible if 1 side is larger than 300 mm on type BENGglas BASIC.

The largest vacuum glass format available is 1,650 x 1,800 mm. From 2024, BENGglas MAX can also be ordered in dimensions 2,440 x 4,200 mm.

The larger the glass surface, the thicker the glass structure will be.
We use different thicknesses BENGglas (8.3 – 10.15 to 10.30 and 12.3 mm).

The following glass thicknesses should be applied based on the total surface area of ​​a single pane:

  • 8.3 mm: < 1.8 m²
  • 10.3mm: 1.8m² – 2.7m²
  • 12.3 mm: > 2.7 m²
What types are available?

In addition to the standard version, there are options for extra clear, extra sun-resistant, frosted glass and laminated hardened vacuum glass. A dirt-repellent coating can also be applied as an option.

Vacuum valve in sight?

BENGglas has 4 types of vacuum glass in its range: BENGglas BASIC, BENGglas , BENGglas MAX and BENGglas +. BENGglas and BENGglas + have a cap in the bottom corner. BENGglas BASIC and BENGglas MAX do not have this.

Does BENGglas also install?

BENGglas is an agent and importer of BENGglas . This means that BENGglas only supplies vacuum glass and does not measure or install your glass. BENGglas has an extensive network of more than 150 dealers in Europe who offer a total solution. You can find this on our website www. bengglas .nl/dealers .

Can I become a dealer?

BENGglas is happy to welcome dealers! BENGglas does, however, impose a number of conditions on a dealership. BENGglas also wants to protect its dealers by not taking on too many parties in one region. You are therefore kindly requested to first express your interest by sending an email to .

BENGglas and renovation?

Because the toughened vacuum glass is so thin (from 8.15 mm), it is an excellent product for renovation. You use your old window frames and only need to exchange the old glass for BENGglas . This way you can provide your (monumental) building with extremely good insulating glass.

What is the delivery time of BENGglas ?

The delivery time for vacuum glass is approximately 12 working weeks for type BENGglas (MAX). For BENGglas BASIC a delivery time of approximately 14 working weeks applies.

Do you want monumental glass? Then take into account + 3 weeks.

BENGglas fire resistant?

The vacuum glass from BENGglas can be fitted with a fire-resistant counter pane for an additional charge.
This means that BENGglas the following classifications:

  • EW30
  • EW30+EI15
  • EW60
  • EW60+EI15
  • EI30
  • EI60

Interested? Contact to discuss the options and rates.


Are there heavy metals in BENGglas ?

No, BENGglas has been tested for heavy metals, such as lead, cadmium, mercury, chromium-6, polybrominated biphenyls (PBBs), polybrominated diphenyl ethers (PBDEs) and does not contain them .

Why is BENGglas a smart investment?

The vacuum insulation glass from BENGglas has by far the best insulation value on the market, which means that you will recoup your investment many times faster than if you opt for HR++, triple or other vacuum glass.

Thanks to this insulation value, you also enjoy a better energy label, which directly leads to an increase in the value of your home or building. Below are a number of examples why BENGglas is not expensive:

Why BENGglas is a smart investment:

  • Long Service Life: more than 25 years.
    At least 2x longer than traditional insulating glass.
    BENGglas not only offers a long service life of more than 25 years, but it is also considerably more durable than traditional insulating glass. Due to the advanced technology and materials used in the production of BENGglas , homeowners can enjoy long-term energy savings and reduced energy costs over the life of the glass.
  • BENGglas is ultra-thin and fits in the existing frames.
    This means that homeowners do not have to incur additional costs for replacing their windows when installing BENGglas .
  • Higher home value through better energy label.
    In addition to the energy savings and lower energy costs, BENGglas also contributes to an increased home value by improving the energy label of your home. This makes your home more attractive to potential buyers and can increase the value of your home. You put the investment in the glass directly into the value of your home or building.
  • Save on additional insulation measures .
    Due to the insulating properties of BENGglas , it is often not necessary to take extra measures, such as installing other insulation material or adjusting the heating system. This not only saves costs in the short term, but also in maintenance costs in the long term.
  • Save more from day 1
    BENGglas Insulates 3x better than HR++ and 2x better than triple glass. This way you save significantly more on your energy bill from day one.
  • No degradation of insulation value
    BENGglas retains its insulation value throughout the glass's lifespan. This means that you will not suffer from degradation and can therefore always enjoy optimum insulation. HR++ and triple glass, on the other hand, lose their insulation value over time. At BENGglas this remains stable for at least 25 years.
How much does vacuum glass from BENGglas cost?

The initial investment of BENGglas is higher than with traditional insulating glass, but generally lower than with other vacuum glass brands.

BENGglas quickly pays for itself. BENGglas offers:

  • a longer life span than traditional insulating glass.
    At least 25 years compared to 15-30 years with HR++ and triple glazing
  • by far the best insulation value on the market without degradation.
    BENGglas retains its insulation value throughout the life of the glass. This means that you will not suffer from degradation and can therefore always enjoy optimum insulation. HR++ and triple glass, on the other hand, lose their insulation value over time. At BENGglas this remains stable for at least 25 years. This way you save more on your energy bill in the long term.

order vacuum glass directly from BENGglas or by requesting a customized quote (including installation) from one of the BENGglas dealers on bengglas .nl/dealers . If you cannot find a suitable dealer, you can always contact your local glazier.

BENGglas BASIC is our entry-level model and has a recommended retail price of € 230 per m² (excl. VAT and excl. installation). Type BENGglas has a recommended retail price of €295 per m² (excl. VAT and excl. installation).
The exact price of BENGglas will depend on the thickness, dimensions, installation height, etc. Our dealers can provide you with a correct competitive quote.

ISDE subsidy is available at BENGglas This is €23 per m² for replacing your glass. If you also replace your window frames, you are eligible for a subsidy of € 65.50 per m². Business customers are eligible for the energy investment deduction (EIA); this can amount to € 300 per m². These subsidy amounts double if you take a 2nd measure (or more). Source: .

How much subsidy do I receive on BENGglas ?

ISDE subsidy is available for the vacuum glass of BENGglas . This is €23 per m² for replacing your glass. If you also replace your window frames, you are eligible for a subsidy of € 65.50 per m².

Business customers are eligible for the energy investment deduction (EIA); this can amount to € 300 per m². These subsidy amounts double if you take a 2nd measure (or more).

Source: .

Which reporting codes can I use for BENGglas ?

You can apply for a subsidy for replacing your glass with reporting code KA18780. If you also replace your window frames, you can use report code KA19317.

BENGglas can be found under the selection HR ++ glass.

You can submit the grant application at

What is the U value?

The U-value indicates the thermal insulation value of a product (in this case vacuum glass). The lower the U-value of a product, the better this product insulates. BENGglas has the lowest U-value in the world of all types of insulating glass (U=0.4) and therefore offers the best thermal insulation.

Below you will find an overview of the average U-values ​​per type of glass:

  • BENGglas : 0.4
  • BENGglas BASIC: 0.58
  • Other brands of vacuum glass: 0.7
  • Triple glass or HR +++: 0.7 / 0.8
  • HR ++ glass: 1.1
  • Double glazing (Thermopane): 2.8
  • Single glass: 5.8
What is the U-value per type of glass?

For each type of glass, several factors determine the U-value, including the coatings, filling (vacuum, gas or air) or the cavity widths. Below you will find an overview of the average U-values ​​per type of glass:

  • BENGglas : 0.4
  • BENGglas BASIC: 0.58
  • Other brands of vacuum glass: 0.7
  • Triple glass or HR +++: 0.7 / 0.8
  • HR ++ glass: 1.1
  • Double glazing (Thermopane): 2.8
  • Single glass: 5.8
What is the noise reduction value?

The noise reduction value is dB=36. Regular sound-reducing glass is very thick and therefore does not fit in every type of frame. If you are looking for sound-insulating glass and it also needs to be thin, then there is only one possible solution and that is vacuum glass.

What is Injury Safe?

BENGglas vacuum glass is always hardened and therefore injury-safe. With injury-resistant glass, only small pieces of glass will fall down in the event of breakage, which cannot cause serious injury. In addition, this allows the glass to be placed up to the ground.

What is the PSI value?

This value indicates the heat loss at the transition of the construction parts in which the glass is incorporated to the outside of a building. For example, consider your window. This value is shown per running meter at a temperature difference between inside and outside of 1 °K. The lower the PSI value, the less the heat loss.

  • Aluminum frame with BENGglas hybrid: 0.035 – 0.04
  • Wooden frame with BENGglas : 0.05 -0.09
  • Aluminum frame with BENGglas : 0.09
What is the PSI value of BENGglas ?

Below you will find the PSI values ​​including BENGglas per type of frame.
The lower the PSI value, the less the heat loss.

  • Aluminum frame with BENGglas hybrid: 0.035 – 0.04
  • Wooden frame with BENGglas : 0.05 -0.09
  • Aluminum frame with BENGglas : 0.09
What is the LTA value?

The LTA value represents the light entry factor. In other words, the extent to which light is guided through the insulating glass. The higher the value, the more light is let through.

Below you will find the LTA value per glass type:

  • Single glass: 90%
  • HR++ glass: 82%
  • Triple glass or HR +++: 74%
  • BENGglas : 70-78% (single or double coating)
What is the G or ZTA value?

The G value, or the ZTA value, represents the solar accession factor. In other words, the extent to which heat radiation is blocked. If you want to ensure that it gets less hot inside during the summer, it is best to opt for a double (D.80) coating. Do you want more heat in your home? Then it is best to opt for a single (S1.16) coating. The insulating glass with a double coating has a slightly darker color than with a single coating. The U-value is also lower with a double coating and it therefore insulates better.

Would you like less light in your home? Then a solar control coating on BENGglas offers a solution. This coating ensures that the sunlight is reflected, so that less light enters. In addition, a sun-resistant coating also has an insulating effect, keeping it cooler inside during hot summer days.

What is the warranty period?

BENGglas has a warranty period of 15 years, a tested lifespan of 25 years and an expected lifespan of 50 years. As an example; Traditional insulating glass offers a term of only 10 years.
The warranty covers 100% for the first 5 years. The following 10 years will decrease proportionately. The warranty only concerns the redelivery of the vacuum glass.


How do I claim a warranty?

BENGglas is produced with the utmost care. However, it can sometimes happen that a window is leaking or has another defect. In order to make a claim under any warranty, we need the following information:

Company name and contact person
Order number
Dimension(s) of defective window
Defect description
Overview photo of complete window with defect, preferably from the inside
Detail photo of defect, preferably from the inside

Warranty requests can be sent to with the subject “Warranty claim [order number]. Requests without the above information cannot be processed.