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Building Systems Sandwich Panels

Sandwich Panels

Like a sandwich you’d eat, sandwich panels are made by putting a filling (usually insulation) between two “sandwich” panels, often some kind of metal.

Often one of the two sheets is ribbed or “corrugated” in a shape that makes the panels stiffer. Being light ├índ stiff, they can easily cover large spaces which makes them quite popular as a roof system.

Because most of them contain insulation material inside the sandwich, they are also known as insulated sandwich panels.

Some – less strong and non-structural – panels are also used to build cooling rooms, labs, temporary offices or garages.

Although they may look deceivingly simple, insulated sandwich panels do several great jobs: they offer structure, protection, waterproofing and insulation in one single, light and easy to place material.

An IsoPan sandwich panel, corrugated, for roof use

Sandwich panels are a smart building system

  • very light and stiff, makes them easy and fast to install
  • provide good thermal insulation
  • large range of colors, some of which reflect the sun and minimize heat transfer
  • all-in-one system; even an internal finish is sometimes not necessary

Limitations of sandwich panels

  • you must buy quality panels; if not, under extreme heat, the outer skin can come loose from the filling (“delaminate”)
  • due to the lack of mass, they have limited sound insulation
  • you can not just “drill through” them without precautions to maintain waterproofing