Introduction to sandwich Panels

The sandwich panels are used for roofing and walling in the building industry. They are extensively used for cold storages.

The sandwich panel consists of two facings of relatively thin metal sheet profiled preferably and of high strength enclosing a core, which is relatively thick and light but has adequate stiffness in a direction normal to face of the panel. The facings are of steel or aluminium. The core is made of polyurethane.

Basic Principle of Sandwich Panel

The structure of the sandwich panel is basically, two facings, which are relatively thin and high strength, enclose a rigid core which is relatively very thick and light in weight which has adequate stiffness in a direction normal to the faces of the panel.

Panel facing sheets specifications:

  • Colour coated Steel sheet coated with Zinc Aluminium alloy coated (AZ 150) for superior durability.
  • The exterior and interior steel thicknesses are 0.32mm and 0.42mm.

Panel Foam specifications:

  • Polyurethane rigid foam insulation layer.
  • Average density : 40 + / - 2 kg/m3
  • Thermal conductivity – 0.02 W/mK
  • Operating Temperature: - 20 ‘ C to +70 ’ C
  • Available thickness: 30, 40, 50, 60, 80, 90, 100, 120, 150mm.

Advantages of Sandwich panels

  • High load-bearing capacity at low weight
  • Excellent and durable thermal insulation
  • Good water and vapour barrier
  • Excellent airtightness
  • Surface finished facings providing resistance to weather and aggressive environment.
  • Capacity for rapid erection without lifting equipment
  • Easier installation in hostile weather conditions
  • Easy repair or replacement in case of damage
  • Economical mass production to pre-cut lengths of components of uniform high quality
  • Long life at low maintenance cost.