Insulated doors. PU/Polyurethane Foam, EPS (Expanded Polystyrene), and PIR (Poly Isocyanurate) are the core insulation material options. Outer skin is generally PPGI / Powder coated GI. Aluminum and SS options are also available. SLIDING Type and HINGE Type doors are offered in various thicknesses and sizes depending upon the sandwich panels’ thickness, project spec. And the temperature to be maintained in the cold room (keeping in view the ambient temp.). Core material are PU, PIR, EPS, rockwool density and thickness depend depending upon the temp. To be maintained in the room. SS, PPGI or Aluminum as skin material of the doors. Sizes of the cold room doors : 900mm x 1800mm 900mm x 2000mm 1000mm x 2000mm 1000mm x 2100mm 1200mm x 2100mm 1200mm x 2400mm Suitable Insulation material with required density. Air tightness for efficiency. Thickness of the skin material depends upon the thickness and core insulation material of the shutter. Good quality hinges for easy operation. Door safety device for emergency opening. Vision panel is optional.