insulation
in|su|la|tion /'ɪnsjʊl'eɪʃən, AM -sə-/
[N-UNCOUNT]
Insulation is a thick layer of a substance that keeps something warm, especially a building.
High electricity bills point to a poor heating system or bad insulation...
see also insulate
[N-UNCOUNT]
Insulation is a thick layer of a substance that keeps something warm, especially a building.
High electricity bills point to a poor heating system or bad insulation...
see also insulate