The importance of insulating glass in passive constructions

Passive houses are the most efficient types of housing from an energy point of view, offering minimal energy consumption and constant thermal comfort, regardless of the season. These rigorous standards cannot be achieved without the use of state-of-the-art construction materials. Among them, insulating glass plays a crucial role in reducing heat loss and increasing the overall energy efficiency of the building.

Insulating glass is used in windows and facades of passive buildings to minimize heat transfer between the interior and exterior. Thus, the indoor climate is kept stable, and the need for heating in winter or cooling in summer is significantly reduced. This element thus becomes essential for achieving the energy performance required by the standards for passive houses.

The major advantages of insulating glass in passive houses

A first benefit of using insulating glass is its exceptional thermal performance. The glasses used are generally triple (tripane), containing special layers with low emissivity (Low-E) and being filled with inert gases such as argon. They allow obtaining a heat transfer coefficient below 0.8 W/m²K, which places the windows in the accepted category for passive houses. In the case of high performance systems, the value of this coefficient can even drop below 0.7 W/m²K.

Another important advantage is the elimination of thermal bridges. These are the areas where heat is lost more easily and can lead to condensation or mold. Modern glazing, together with thermally optimized joinery profiles, reduce these risks to a minimum, helping to maintain a constant temperature and create a continuous thermal envelope.

In addition, the insulating glass allows natural light to enter the interior of the building without compromising thermal performance. Thus, the spaces remain bright and comfortable, and the need for artificial lighting during the day is reduced, which contributes to a decrease in total energy consumption.

Thermal insulating glass as a key factor for compliance with the passive house standard

Passive house standards impose clear limits on energy losses, and insulating glass is an effective solution to meet them. This contributes to:

•     reducing heat loss in winter, keeping the heat inside;
•     blocking the penetration of excess heat in the summer, preventing overheating;
•     removing condensation from the surface of the windows, by maintaining an optimal internal temperature;
•     maintaining a healthy indoor climate without sudden temperature changes;
•     increasing the overall energy efficiency of the home by up to 30% compared to traditional windows.

Through these benefits, insulating glass becomes a determining factor in achieving and maintaining the performance of a passive building.

How does insulating glass influence green certifications such as LEED and BREEAM

International sustainability certifications such as LEED and BREEAM are based on rigorous assessment of the building's environmental impact, energy efficiency and indoor environmental quality. Windows equipped with high-performance insulating glass contribute directly to meeting the requirements of these systems.

First, the reduction of heat transfer through the glazing results in lower energy consumption for heating and cooling, which contributes to a higher score in the energy efficiency category. Secondly, the use of windows that favor the penetration of natural light and offer a view to the outside supports the score in the categories related to the comfort of the occupants and the quality of the indoor environment. Last but not least, the contribution of insulating glass to the reduction of operational carbon dioxide emissions has a significant impact on the overall assessment of a building's sustainability.

Therefore, choosing thermally efficient windows not only ensures compliance with the technical requirements of a passive house, but also facilitates obtaining valuable green certifications that increase the market value of the building.

High-performance insulating glass is a fundamental component in the construction of passive houses and sustainable buildings. With its ability to drastically reduce heat loss, ensure long-term indoor comfort and contribute to green certifications, it becomes an essential investment in efficiency and ecological responsibility.

For any developer, architect or end user, choosing windows with high-performance insulating glazing is a smart decision that directly influences the durability, value and energy efficiency of a modern building. In the context of European and international standards becoming more and more strict, thermal insulating glass remains one of the most effective solutions for a sustainable future.

With nearly three decades of experience in glass processing and insulating glass manufacturing, Valras has established itself as a reliable partner for projects aimed at energy efficiency and sustainability in construction. The company offers a diverse range of glazing solutions dedicated to passive houses, from tripan glazing with Low-E layers and inert gases, to customized configurations adapted to modern architectural requirements. By using the latest processing technologies, Valras produces thermal insulating glass with a thermal transfer coefficient of up to 0.5W/m²K, an exceptional value that meets the most demanding standards regarding energy performance. This expertise, together with the commitment to quality and innovation, makes Valras an essential supplier in the development of passive constructions and in achieving long-term sustainability goals.

Are you ready to invest in comfort and efficiency? Contact us for a personalized offer!