Frequently Asked Questions (FAQ)

Van Ruysdael shifts the focus from insulation to wellbeing and context for window glass. Our approach goes beyond standard standards and labels, based on 25 years of research. Our glass offers thermal comfort without excessive energy consumption, with 50% better insulation than single-glazing and 99% heat-reflective properties. More efficient and effective than insulation glass with the lowest U-value.

Unlike (triple) double or vacuum glazing, Van Ruysdael glass creates a balanced and healthy living environment. It prevents moisture-related problems such as mould, bacteria and building damage, and provides clear and natural light without annoying cavities, strips or dots. Good bright light contributes positively to your well-being and performance. Van Ruysdael glass is designed to achieve thermal comfort without burdensome conditioning.

Van Ruysdael glass achieves more with less material, it lasts longer, performs better and is more aesthetically pleasing compared to conventional insulating glazing. As a result, more energy can be saved and compensating ventilation and heat exchange techniques are no longer necessary. It is glass without vulnerable cavity, spacers, dots, gas or vacuum. It fits technically and aesthetically into existing windows so that original windows are preserved and enhanced. As for thermal performance: the quality of Van Ruysdael glass does not degrade. We can assure this with a lifetime guarantee, which inspires confidence and reinforces durability. By preserving heritage, protecting it and optimising thermal and acoustic comfort, we need to take fewer raw materials from the earth, thus working towards a regenerative system.

When it comes to major maintenance of windows in national monuments, subsidy opportunities are available to preserve the monument. This allows you to preserve the historical value and appearance of your building with Van Ruysdael glass. Subsidy is a temporary contribution from the government for starting an activity such as the application of (triple) double or vacuum glass, whose economic importance is not immediately obvious. Van Ruysdael glass is an independently profitable investment. Due to its demonstrable economic benefits, there is often no need for subsidies. It offers durability, energy efficiency and long-term performance that pays for itself over the lifetime of the glass. This makes Van Ruysdael glass a valuable and cost-effective choice without external financial support.

This natural phenomenon, where vapour turns into liquid, has an important role to play if you aim to save energy, maintain a healthy indoor environment and reduce costs. The temperature in your home affects the amount of moisture the air can hold. Warm air can hold more water vapour, but this can lead to risks such as mould and building damage. With good insulating glass, the inner pane of glass is warmed up, preventing excess moisture from condensing on the inside of the glass. This excess moisture initially remains in the air as vapour and more energy is required to reach the same wind chill. When Van Ruysdael glass is applied, condensation is not suppressed or moved to vulnerable building parts and the moisture in the air, providing multiple benefits: Improved thermal comfort: You experience higher thermal comfort in your home due to less moisture in the air. Lower thermostat settings: As the windchill remains comfortable, you can set the thermostat lower without sacrificing comfort. Healthy indoor climate: Effective moisture management keeps the indoor climate healthy. Additional energy savings: The above benefits contribute to energy savings, which is beneficial for both the environment and your wallet. For additional insight, condensation releases heat equal to the inverse of heat of evaporation. This contributes to understanding the thermodynamics behind this natural process. Condensation on glass has a meaningful role in creating a healthy, comfortable and energy-efficient indoor climate with Van Ruysdael glass.

Living, learning and working with too much moisture is unhealthy. For yourself AND for the building structure. In 2015, research showed that 80 million people in Europe live in unhealthy and excessively damp homes. In schools and offices, the situation is not much different. Moisture is unfavourable for energy consumption. Because the invisible moist air feels colder and to heat the room you need a multiple of energy for the same room temperature compared to dry air. If it is occasionally more humid inside, it is often easy to fix. If moist air or condensation persists for a long time, it is important to know where the moisture has its origin in order to be able to reduce it if possible or to remove it effectively. More or less condensation on Van Ruysdael glass indicates that it is (too) humid in the room and some ventilation is needed. This allows you to achieve and maintain a healthy indoor climate. Moisture in the home is mostly caused by people, showering, cooking, plants, animals, washing and drying, for example. Remodelling work or rising groundwater sometimes also brings in extra moisture. Especially if windows and doors are fitted with draught seals, the (moist) indoor air cannot ventilate away to the outside. When using Van Ruysdael glass, the air stays drier when the excess moisture (vapour) turns into condensation (water) in a cold place. The glass, for example. Usually this is not desirable, but it is certainly not bad for the glass, it is good for the building structure and for the air inside. The moist air can also be exhausted to the outside. Although almost every living and working situation is different, the solution is almost always the same; ventilation. In old houses with uninsulated glass, keeled windows, doors and roofs, for example, this already happened naturally. In that situation, the temperature in the house was difficult to control and costly. Now we insulate everything tightly but then we must not forget to ventilate at regular intervals. Often, opening a window for a certain time is enough to have a healthy and pleasant climate in the house, while also keeping energy consumption low due to drier air. You can also adjust the temperature much faster and better in your new situation. Should the occasional window opening still not be enough, there is (too) much moisture production compared to the ventilation. In that case, you can opt for a more structural ventilation solution. If you opt for mechanical with or without heat recovery, keep in mind that such compensation techniques cost more in energy and money than it saves you, and it involves extra maintenance, noise and health risks. Other glass that condenses less or not at all (on the inside) exists. The downside is that such glass does not reduce the invisible moisture in the indoor environment but moves it (as invisible vapour) into the air or to other building parts. This is usually accompanied by unwanted, unhealthy and not risk-free bacterial and/or mould growth. When you do control humidity, you get a healthy living environment. Plus, you're going to use less energy. And, windows will have little to no condensation. At high humidity and certain low temperatures, Van Ruysdael glass condenses on the inside. this signals (too) humid air indicates the ventilation requirement keeps humidity at a healthy level reduces energy consumption is in balance with the building structure contributes to a healthy living environment

Van Ruysdael glass offers suitable solutions for all types of buildings, whether existing structures or new construction projects, and regardless of whether it is a UNESCO World Heritage Site or an unclassified house in which you want the best. The strength of Van Ruysdael glass lies in the perfect interplay of aesthetic and technical performance that blends seamlessly into its surroundings. This makes the glass more than just compliant with the highest insulation standards. Nevertheless, there remain some limitations in current building regulations, labels and standards, which are still mainly based on insulation values. Van Ruysdael aims for an approach that supports the climate and living environment in a healthy way, as initially intended.

Fundamentally, insulating glass is designed to drastically reduce greenhouse gas emissions. Secondarily, to optimise thermal comfort in the home and thus reduce energy consumption in the home. Van Ruysdael ensures that your glass is attuned to the overall environment in which it acquires its significance. No less important is that the glass with all its performance lasts unabated for life.

Everyone is free to choose. There is insulation glass such as (triple) double or vacuum glass with increasingly lower insulation numbers and there is Van Ruysdael glass. What is important when considering a choice: Insulating glass is the norm, it is promoted and most people choose it. Van Ruysdael glass, on the other hand, you choose for its beauty, practical performance and tangible comfort, but also because it balances with nature and fits best with the environment it is intended for. You can also choose Van Ruysdael because it provides a healthy living environment in your home. No less important is the lifetime thermal guarantee on Van Ruysdael glass.

The U-value, also known as the insulation value, is a numerical value indicating the amount of heat transmitted per square metre and per degree of temperature difference between both sides of a window pane. The unit of the U-value is W/(m²-K). A lower U-value means that the window pane will transmit less heat. However, it is important to understand that preserving a house involves more than just aiming for the lowest possible insulation value. Insulation is only part of the bigger picture. While figures are useful for calculations, we should be aware that they do not tell the full picture and that there are more factors to consider.

Van Ruysdael bases his approach on purpose, environment and circumstances, giving value to what really matters. We meet the needs of the current generation, without overburdening future generations both here and elsewhere. But also that what we do is regenerative. Van Ruysdael glass is specifically designed to achieve climate goals more effectively and quickly, while also taking into account the evolving climate conditions in our region. It is getting warmer and less and less energy is needed for heating. Van Ruysdael glass is already providing that. It achieves an insulation value that is in harmony with the environment and conditions. In order not to upset this balance, we only aim for what is necessary, with our current performance still 50% better than uninsulated single-glazing. Yet to save more energy, Van Ruysdael glass reflects 100% of the heat radiation back into the building. This combination of insulation and reflection gives the optimum result for: Optimal thermal comfort: The combination of insulation and reflection in Van Ruysdael glass makes it possible to set the thermostat lower than in the best-insulated house. This translates into significant energy savings. Healthy and natural moisture regulation: Van Ruysdael glass does not displace moisture in the home, which reduces the need to heat water vapour. This has a positive impact on the wind chill and results in further energy savings. A healthy living environment: Van Ruysdael glass maintains a natural and healthy air quality in the home, making burdensome conditioning techniques unnecessary. This saves materials, maintenance, recycling, space, money and energy. Aesthetics: Van Ruysdael glass provides the clearest window glass, which contributes significantly to your health. It also offers the most beautiful and natural look and feel. Guarantee: Van Ruysdael Premium glass comes with a lifetime thermal guarantee. This ensures a cost-effective investment that delivers optimal results in line with the intended goals.