SOPRA-XPS 40 are rigid thermal insulation boards made of extruded polystyrene closed-cell foam. It is mainly used for SOPREMA foundation systems under slabs, civil engineering applications, protected-membrane roofing systems (inverted), parking decks and plaza decks.

Product Properties

  • Material Extruded Polystyrene
  • Use Insulation


Insulation boards are laid flat on the ground for applications under concrete slab. When installing multiple layers of SOPRA-XPS 40 all joints should be staggered between layers.

Refer to SOPREMA’s published technical literature for additional details and application requirements.


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