The ready-made insulation panel or the cold room’s wall, SANDWICH PANEL, consists of PS PU PUR PIR and ROCK WOOL PANEL FOAM in cheap price made for building the rooms such as cold room, ready-made cold room, fire proof insulation panel room, fire proof cold room, chill room, and storage room. The edge of the panel is strong. There is no edge separation. The panel connecting system is easily for installation. For the wall and ceiling, there are 3 layers of iron folding.