Sandwich-insulated log
The invented Product has high insulation qualities and low thermal conductivity. For the most part, this is achieved by manufacturing the insulation at a high temperature and pressure, which gives it a fully homogeneous and closed pore structure, making convection within it impossible. The insulating properties of the insulation material are shown in the following table.
To illustrate the U-value of the Product: in case of an external wall with the insulation thickness of merely 150 mm and wood thickness of 100 mm, the U-value is as low as below 0.2, i.e., the actual U-value is 0.19. However, this does not characterise the insulation properties of the structure to the full. You also need to consider the compaction coefficient of the structure (n50). The smaller and denser the structure (pore dimensions 0.05–0.1 mm), the better the insulation, as is the case with our Product. Neither does the U-value characterise the precise internal convection of the insulation material. What matters is that the pore structure of the insulation used in our Product is perfectly homogeneous and closed. On the left side of the picture is the capillary pore structure of the well-known Styrofoam-like insulation and on the right is the homogeneous pore structure with completely closed pores, which we use.
The thermal insulation properties of the Product virtually do not depend on
the application conditions. The closed and fully homogeneous pore structure encloses the air (thermal conductivity (λ10) 0.026 W/(mK)) securely inside the pores. Since there is no air circulation inside the insulation, which could significantly reduce the insulation properties of the structure, the insulation layers also function as a wind barrier. The hydrophobic insulation maintains its insulating properties even in extremely wet conditions, since air inside the insulation material of the wall does not move. Due to the fact that the pores of the insulation material are filled with air, the thermal conductivity of the air decreases as the temperature decreases and the insulating properties improve as the weather grows colder. This is why the Product is especially perfect for use in cold regions (it becomes more effective as the temperature decreases), since its insulating properties are best in severe cold. The thermal resistance of a freeze-proof insulation material is measured at -5 °C where its insulating properties are better than, for example, at +10 °C. The ground frost insulation bears a CE-marking and corresponds to the strictest thermal conductivity values established with the relevant European standards (0.034 or 0.036) as panels installed in dry rooms (0.035 or 0.037). Due to its density, the insulation material does not let through harmful air currents, and, therefore, its thermal conductivity does not increase in time, i.e., its insulating properties do not deteriorate with time, since the pores of the insulation material are filled with regular air. At the same time, it is important to note that the Product is also suitable for very warm regions, because due to the aforementioned properties, warm or hot air can neither permeate the insulation nor have any significant effect on it. The insulating properties do not deteriorate even with time. The Product allows the easy construction of wooden buildings or houses with low energy needs and a "zero-energy house" is also easily achievable.