• JohnnyEnzyme@lemm.ee
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    3 months ago

    Insulation and decoration.

    Pardon the late reply, but what would the walls themselves be made of? They almost look like layered cardboard there. Or maybe sheet metal.

    • PugJesus@lemmy.worldOPM
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      3 months ago

      Cardboard as a kind of drywall was sometimes used under the papers, but wood for the structure itself.