The physics of building structures shows that the sun operates most on southern walls.

In comparison, eastern walls are slightly less exposed to this impact, western walls even less, and northern walls are almost not exposed at all to thermal loads from solar radiation.

This is of significant importance for the behavior of sandwich panels on a building, as this material is made, among other things, of steel, which expands and contracts with temperature changes due to the heat generated by solar activity.

This is an objective physical phenomenon that occurs in nature, and it is for this reason that, for example, railroad or streetcar tracks are laid with dilatation, a distance that compensates for the work of the material under the influence of thermal cycles.

In sandwich panels, bright colors are recommended for south walls, and in the case of EPS core, an additional expansion joint is recommended if the length of one panel exceeds 7m. Each time, the architect/designer determines the loads specific to the object, including thermal loads. Therefore, when selecting materials, it is necessary to use the technical data from the design of the building and the material (board).