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Heat-insulating properties


Save energy and thus the expenditure on heating the house.

In winter accumulates heat in summer is a nice shade of the house.



Basic Principals

Thermal protection in buildings directly influences the use of energy for heating and cooling, as well as the ability to control the room climate. Less thermal protection results in more energy usage for heating and cooling and a much less comfortable room environment.


The thermal protection requirements for the external construction elements of buildings are generally categorized into one of two groups, either summer or winter.
The thermal protection for winter conditions is intended to minimize heat loss from the building, thus allowing the building to be economically heated. Furthermore, the interior surfaces of the external elements, such as walls and ceilings, should not drop below a certain minimum temperature in order to avoid condensation. The thermal protection properties must, therefore, be determined by considering both criteria.

In contrast, the thermal protection for summer conditions is intended to minimize heat gain from the warm outside temperatures and sun rays, thus allowing the building environment to be economically controlled in a comfortable state. Thermal protection in the summer is mainly determined by the capability of the exterior building elements to store and dissipate heat. This property is determined by the mass and thermal conductivity of the building material. As shown below, the thermal mass and thermal conductivity establish the thermal inertia, which causes a damping and time lag of the temperature peaks.

With YTONG, a construction material is available that optimally combines the material properties necessary to provide excellent thermal energy efficiency for the building. Additional thermal protection is not required.




The YTONG-THRAKON - building system also provides an airtight envelope, which is critical in controlling the comfortable and healthy indoor environment. A major emphasis in heating and cooling system design is to minimize "uncontrolled" ventilation air. By providing an airtight building envelope, YTONG minimizes the "uncontrolled" air changes and allows the ventilation air to be "controlled". With the use of a dehumidifier, the moisture content of the ventilation air can also be controlled which optimizes the comfortable indoor environment. Overall, the volume and quality of ventilation air can be easily and accurately controlled in an YTONG building - thus providing a comfortable, economical and healthy environment.

These excellent thermal protection properties of YTONG - exterior walls were confirmed in a study by the Centre of Renewable Energy Sources of Greece for YTONG. In more details, the study proved that if you build your house with YTONG Blocks, you can achieve 6,6% reduction of the energy you spend in order to heat the building and 41,4% reduction of the energy you spend to cool the building. On the same time, and in the case you build your house with YTONG Blocks (masonry) and YTONG Panels (ceiling) you can achieve 13,4 % reduction of the energy spent to heat the building and 54,2 % reduction of the energy spent to cool the building.





Thermal Inertia

In addition to the insulation values and their impact on energy consumed, we must also take into account comfort and well being within the building. Once again, YTONG stands out in this area due to its excellent thermal qualities. During periods of intense heat or solar radiation, a well insulated building with good thermal inertia will remain pleasantly cool during the day and retain a sufficient temperature at night.
Obtaining good thermal comfort requires not only external walls with high thermal capacity (with a high mass to be able to “absorb” the heat), but the wall must also be insulating so that the heat does not pass to the other side too quickly.
A simple insulant has too low a mass and so cannot store the heat. With a light roof composed of insulation and steel sheet or tiles, a “caravan” effect will arise. This is a rapid heating of the building subject to solar radiation causing discomfort due to excessive heat. The only solution to combat this heating is air conditioning, which is very costly in terms of energy.


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