What is Modified Expanded Polystyrene (EPS)?

The expandable Polystyrene resin used in ThermaSteel Green panels is modified by the supplier of the raw material to resist flame spread and is in full compliance with the ICC building codes and has received HUD approval. The use of EPS as rigid thermal insulation gives the ThermaSteel Green panel the following advantages:

  • R-Values are consistent and stable due to the closed cellular structure, which
  • contains stabilized air.
  • Components are rigid and lightweight.
  • Contains no CFC's or HCFC's. There is no off gassing.
  • Contains no formaldehyde
  • Resists fungus, decay and moisture gain
  • Will not rot - highly resistant to mildew
  • Environmentally safe.
  • Lessens risks of cancer and of respiratory and skin irritations from certain other types of insulation.
  • No food value for termites and other common wood eaters.

How does Modified Expanded Polystyrene stand up to termites, ants and wood boring insects?

The bottom line is that insects just don’t feed on Modified Expanded Polystyrene (EPS) and steel. It offers them no food value. Certain species of termites will find ways to pass through minute cracks in concrete to get to their favorite food which is wood. Likewise they have been known to bore their way through EPS to get to wood and ants have been known to nest in certain types of EPS. The problem has been corrected by soil treatment, by creating barriers between the panels and the slab and by treatment of the panels. TAMBOR™ is an approved insecticide that can be applied into the bottom track to provide a barrier.

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