|EFTE roofs used in the Eden Project (wikipedia)|
He forgot to mention the most important of the disadvantages that happens to cancel one of advantages: while EFTE might be suited to resist terrorist bomb blasts, it definitely cannot resist fire. Moreover, it feeds to it as EFTE is a flammable material.
This brings bad news to plastic housing from a safety perspective.
Dr Guillermo Rein
Senior Lecturer in Mechanical Engineering
Imperial College London