I hired them to do the 'insulation' of the attic. [=to insulate the attic]
These materials provide the 'insulation' needed in cold weather.
They used fiberglass 'insulation'.
(..) If I couldjust put this... put this in there. - Right. - Oh, damn it. Check the insulation. Oh, shit! - Steady. - According to this, it's within five meters. Changes in the density, my ass. (..)1979 Alien