Sandwich panel is a newest thermal insulation building material.

It can be divided into two types, one is plastic board with steel plate on both sides, the other is all made by plastic boards; for the first one, it can be: steel plate+EPS/XPS/Rock Wool board/PU+steel plate, it is normallly used in prefabricated house; the second can be: PVC+XPS+PVC, PS+XPS+PS, PU+XPS+PU etc.

It is usually household used; and all the sandwich panel is good at thermal insulation.