###### TEKNOİZOLASYON

The thermal conductivity coefficient, lambda (λ), expresses how much heat a material transmits depending on the physical and chemical structure of a material.

The unit of thermal conductivity coefficient W / mK is the amount of heat that passes between the surface of the thermal insulation material perpendicular to each other at 1 m distance, when the temperature difference is 1 ° C. The lower the thermal conductivity value of a material, the less it conducts heat.

#### Thermal Conductivity Coefficient

Thermal Transmittance Coefficient The unit of thermal permeability coefficient W / m2K is the amount of heat that passes vertically through the surface of 1 m in 1 hour when the difference between the temperatures of two parallel surfaces of a material with thickness d (m) is 1K = 1 ° C.

The U value depends on the thermal conductivity coefficient (λ) of the materials and their thickness in the direction of heat transfer. The lower the heat permeability coefficient, the less heat loss will be. U value is the energy loss per square meter.

#### Thermal Transmittance Resistance

The product of the unit price of energy and the building surface area and U values ​​shows, in a simple approach, the material loss resulting from energy loss. Thermal Permeability Resistance Thermal permeability resistance R value is the resistance of a building material to heat transfer.

To evaluate the performance of the application made or to be made, the thermal permeability resistance (R) should also be calculated. Thermal permeability resistance is the arithmetically opposite of the thermal permeability coefficient.

It is a measure of the thermal quality of a building element related to its location in the building. The purpose of insulation applications is to reduce the U value as much as possible. Increasing the R value will make the U value go down. To increase the R value, either the plate thickness should be increased or the heat transfer coefficient should be reduced.

#### Heat Bridge

Thermal bridges are the regions where the heat transfer caused by the material or construction in the building is intense compared to the other parts of the building. These sections are weak points in terms of thermal insulation. Therefore, lower surface temperatures occur on the inner surfaces of the sections with thermal bridges.

Significant heat loss occurs compared to adjacent sections. The formation of thermal bridges causes increased energy costs, the risk of mold due to steam condensation, cracks in the building, and the accumulation of dust and dirt.

Thermal bridges are areas on the outer walls, floors and ceilings of buildings where heat can penetrate more easily from outside to inside than neighboring areas. The fewer thermal bridges a building has, the higher the building’s energy efficiency. Thanks to a good planning, correct application and use of the right material, these thermal bridges can be prevented.