ANSWER

The expandable Polystyrene resin used in INSULAR 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 INSULAR 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

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