insulation thickness requirement on exterior wall

This is a technical article for professionals.The insulation material thickness should be at least 100 mm, and the material thickness of the roof of the top floor should be 120 mm. The location of the house on the first floor close to the ground of the outer wall also depends on whether there are thermal measures or not. These minor details are important factors that can be important factors to affect our house is warm or not. When buying an existing home, these factors can be viewed on our mind.

what thickness value should be suitable on exterior wall of our buildings?it is calculated according to the limit of external wall heat transfer coefficient required by local building energy saving standards.For example, Changchun is a severely cold area, and the thickness of the insulation layer is less than the standard limit after calculation (or calculation with corresponding energy-saving software).

The insulation materials are expanded polystyrene foam materials which is eps in short.