FREQUENTLY ASKED QUESTIONS

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.

BENGglas® has an insulation value that is many times better than traditional forms of insulating glass. In fact, BENGglas® offers the best insulating glass in the world, with its U-value (insulation value) of 0.40.
And this investment is immediately reflected in the improvement of the energy label of your home. This means you will immediately benefit from an increase in the value of your home!

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

Conditions over a period of 25 years can be simulated using a lab test. After such a test, the U-value (insulation value) appeared to have been fully maintained. That is why BENGglas® guarantees a lifespan of 25 years. The expected lifespan of vacuum glass is 50 years.

The noise reduction of BENGglas® is 36 dB. In a layered version this increases to 39 dB.

The vacuum glass from BENGglas® 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
• 12.15 – 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:

• 8.15 – 8.3 mm: < 3 m²
• 10.15 – 10.3 mm: 3 – 3.5 m²
• 12.15 – 12.3 mm: > 3.5 m²

This prevents possible bends in the glass. This is why it is important to follow the above rule.

Below are the minimum thicknesses per type of BENGglas®:

• BENGglas Extra Clear: 8.3 mm
• BENGglas MAX: 8.3 mm
• BENGglas BASIC: 8.15 mm (tempered from 10.15 mm)
• BENG glass +: 8.3 mm
• BENGlas Solar Control: 8.3 mm

If you want to make BENGglas BASIC in a tempered version, the minimum thickness is 10.15 mm. Type BENGglas +, BENGglas MAX, BENGglas Solar Control and type BENGglas Extra Clear are tempered as standard.

The vacuum glass from BENGglas® can be thickened to the desired glass thickness. An additional 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 millimeters. The U-value (insulation value) of the vacuum insulating glass remains the same even after this thickening.

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

Type BENGglas BASIC can only be ordered with a single coating. With type BENGglas MAX you have the choice of a single or double coating. These coatings influence the U-value (insulation value), LTA% value (light penetration factor) and the G-value (sun penetration factor). With a double coating these values ​​are lower than with a single coating. This means that with a double coating you achieve better insulation value and sun protection. However, the glass often looks a bit darker in tint. Always contact a dealer to view the product samples before purchasing. You are also always welcome to take a look at our showroom in Goirle.

The vacuum insulating glass from BENGglas® is easy to install, comparable to installing HR++ glass.

For more information, download the installation instructions and user manual. Looking for another language? Consult all documents here on our website.

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 relevant kit manufacturer.

Recommended and approved sealants for BENGglas® are:

• Flour – Easyseal-XPS
• Flower – Renoseal
• Flour – MSP Oneseal
• Swallow Den Braven – Monustop
• Dow– Dowsil 982
• Kömmerling – GD920

Or other low-acid sealant.

BENGglas® vacuum insulating glass 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 easily this overview or request one via info@bengproducts.nl .

With larger volumes, more is often possible than the overview shows. You can keep the overview for a small number of diamonds in a relevant shape.

A surcharge of 50% is charged as standard for shaped windows.

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

BENGglas® can be ordered in a minimum glass thickness of 8.3 mm.

The smallest size BENGglas® is 200 x 230 mm. Smaller is possible provided that 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. The following glass thicknesses should be applied based on the total surface area of ​​a single pane:

• 8.15 – 8.3 mm: < 1.8 m²
• 10.15- 10.3 mm: 1.8 m² – 2.7 m²
• 12.15 – 12.3 mm: > 2.7 m²

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

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

BENGglas® is an agent and importer of vacuum glass. This means that BENGglas® is only a supplier of vacuum glass and does not measure or install glass. BENGglas® now 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 .

BENGglas® is happy to welcome dealers! BENGglas® does impose a number of conditions on a dealership. BENGglas® also wants to protect its dealers by not accepting too many parties in one region. You are therefore kindly requested to first express your interest by emailing info@bengproducts.nl .

Because the tempered 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.

The delivery time for vacuum glass is approximately 12 working weeks for type BENG glass (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® vacuum glass can be fitted with a fire-resistant counter pane for an additional charge.
BENGglas® therefore meets the following classifications:

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

Interested? Contact info@bengproducts.nl to discuss the options and rates.

No, including BENGglas MAX, 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.

The vacuum insulating glass from BENGglas® has by far the best insulation value on the market, meaning you will recoup your investment many times faster than if you opt for double glazing (HR++), triple glazing or other vacuum glass.

This insulation value also gives you a better energy label, which directly leads to an increase in the value of your home or building. Below are a number of examples of 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 lifespan 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-lasting energy savings and lower energy costs throughout the life of the glass.
• BENGglas® is ultra-thin and fits into existing window frames.
  This means that homeowners do not have to incur additional costs for replacing their window frames when installing BENGglas®.
• Higher home value due to a better energy label.
  In addition to energy savings and lower energy costs, BENGglas® also contributes to 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. The investment in the glass therefore goes 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 additional measures, such as installing different 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 will save significantly more on your energy bill from day one.
• No degradation of insulation value
  BENGglas® retains its insulation value during the entire lifespan of the glass. This means that you will not suffer from degradation and can therefore always enjoy optimal insulation. HR++ and triple glazing, on the other hand, lose their insulation value over time. With BENGglas® this remains stable for at least 25 years.

The U-value indicates the thermal insulation value of a product (here 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 glass type:

• BENGglas MAX: 0.40 – 0.50
• BENGlas Solar Control: 0.40
• BENG glass +: 0.45-0.55
• BENGglas BASIC: 0.58
• Triple glass or HR +++: 0.7 / 0.8
• Double glazing HR++ glass: 1.1
• Double glazing (Thermopane): 2.8
• Single glass: 5.8

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

• BENGglas MAX: 0.40 – 0.50
• BENGlas Solar Control: 0.40
• BENG glass +: 0.45 – 0.55
• BENGglas BASIC: 0.58
• Triple glass or HR +++: 0.7 / 0.8
• Double glazing HR++ glass: 1.1
• Double glazing (Thermopane): 2.8
• Single glass: 5.8

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 soundproof glass and it must also be thin, then there is only 1 possible solution and that is vacuum glass.

BENGglas® vacuum glass is always tempered and therefore injury-proof. With injury-resistant glass, only small pieces of glass will fall down when broken and cannot cause serious injury. Moreover, this allows the glass to be placed all the way to the ground.

This value represents the heat loss at the transition from the structural parts in which the glass is incorporated to the outside of a building. Consider your window frame, for example. This value is displayed 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 BENG glass hybrid: 0.035 – 0.04
• Wooden frame with BENGglas®: 0.05 -0.09
• Aluminum frame with BENGglas®: 0.09

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 BENG glass hybrid: 0.035 – 0.04
• Wooden frame with BENGglas®: 0.05 -0.09
• Aluminum frame with BENGglas®: 0.09

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)

The G-value, or the ZTA value, indicates the sun penetration factor. In other words, the extent to which heat radiation is blocked. If you want to ensure that it becomes less warm inside during the summer, it is best to opt for a double coating. Do you want more warmth in your home? Then it is best to opt for a single coating. The insulating glass with a double coating turns slightly darker than with a single coating. The U-value with a double coating is also lower and therefore insulates better.

Do you want less light in your home? Then a sun protection coating on BENGglas® offers a solution. This coating ensures that sunlight is reflected, allowing less light to enter. In addition, a sun protection coating also has an insulating effect, keeping it cooler inside during hot summer days.

BENGglas® has a warranty period of 15 years, a tested lifespan of 25 years and an expected lifespan of 50 years. To illustrate; 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.

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 info@bengproducts.nl with the subject “Warranty claim [order number]. Requests without the above information cannot be processed.