Between steel,glass fibre,wood,air,copper ,which material is suitable to use as ceiling insulation that keeps a home cool in summer and warm in winter?

Glass fibre is the most suitable material to use as ceiling insulation that keeps a home cool in summer and warm in winter. Glass fibre insulation has high thermal resistance, which helps to prevent heat transfer through the ceiling. It is also non-combustible and does not absorb moisture, making it a durable and effective choice for insulation. Additionally, glass fibre insulation is easy to install and is cost-effective compared to other materials such as steel, wood, copper, and air.

Air