Comparison of thermal insulation

Thermal features of standard building materials

(based on Israeli standard number 1045)

Material Maximal weight (kg/m³)

Thermal conductivity specific calculation W/mºC* (λ)

Concrete 2400 2.10
Aerated concrete 500 0.16
Glass/Rock wool > 25 0.16
Foamed polystyrene 15-30 0.04
Rigid PU foam > 27 0.03
Sprayed PU foam > 27 0.03
Thermal plaster 400 0.115
Raised Perlite < 100 0.06

* The calculated conductivity is the value used for the calculation of the thermal insulation features according to the establishment of standards and takes into account the water content in the material during its practical use.

Comparison of the insulation ability of the standard building materials (heat conductivity data according to Israeli standard number 1045)

It needs to be mentioned that the tested thermal conductivity values of the foam produced by Polyurethane Ltd. are even lower than the value used for the standard calculation, as can be seen below in the test results carried out by the laboratories of Bayer AG, the world leader in the PU market. Following are the test results (PU sample marked with LEU-2147-SH9-5):


Comparison of the insulation ability of the standard building materials (thermal conductivity results according to laboratory tests carried our by Bayer AG)

Illustration of insulation activity on existing building

Below are pictures taken with an infra-red camera. In effect, this photography is carried out according to heat of objects in the area (similar to military and civil systems for night vision). Hot objects are those that emit a lot of heat to the environment and appear in the “warm” colors (on the upper edge of the scale to the right of each picture): red, orange and yellow.
Cold objects emit little heat to the environment and appear in the “cold” colors: dark blue, light blue and green. The pictures were taken on the same day, in the same environment and the same camera.

The house insulated with effective PU insulation of the IN series does not emit heat from the insulated areas. Only through the windows (in red) escapes heat but not through the building walls (in green/blue). In other words, the heat stays inside the house and is not being emitted to the cold environment outside the building. The house without PU insulation emits a lot of heat (energy) through its walls, more than through the windows. The waste is huge and so are the heating bills.

PU insulation foams of the IN series are produced by Polyurethane Ltd., owner of knowledge agreements with the German concern Bayer AG, for manufacturing and selling PU systems. The foams have been successfully applied for some decades around the world for different applications: spraying of residential housing, casting/pouring of elements for the insulation of cold store, spraying of agricultural constructions, casting of refrigerators, picnic boxes and many more.



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