insulation

US /ˌɪn.səˈleɪ.ʃən/
UK /ˌɪn.səˈleɪ.ʃən/
"insulation" picture
1.

material used to insulate something, especially a building

:
The house needs better insulation to keep it warm in winter.
Fiberglass is a common type of insulation.
2.

the action of insulating something

:
Proper insulation of the pipes prevents them from freezing.
The company specializes in thermal and acoustic insulation.