Also means
expanded polystyrene (EPS) insulation
Usage Note
Polystyrol (expanded form: Styropor, a trade name) is a foam insulation board used on facades, roofs, and under floor slabs; it is lightweight, cheap, and the most common insulation material in German external wall insulation systems.
Examples
"Die Fassadendämmung besteht meist aus Polystyrol-Hartschaum."
Natural Translation
Facade insulation usually consists of polystyrene rigid foam.
Literal Translation
The facade-insulation consists mostly of polystyrene-rigid-foam.

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