Waterproof, thermal insulation in rolls made of strips of sel-extinguishing expanded polyrethane, laminated between two polyetylene glass filtres, coupled with an elastoplastomeric polymer-bitumen waterproofing membrane reinforced with glass fibre felt or composite "non-wowen" polyester fabric stabilized with fibreglass, both of which are ror-prof. Consult the technical sheet of the product for the resistance values.