Rockwool is a type of thermal insulation made from heated, naturally-occurring minerals. It is generally considered to be safe, effective and efficient at blocking the transfer of heat. They are often used to prevent the spread of fire in building,in light of their extremely high melting point of 1,800°F to 2,000°F. Rockwool can play a significant role in reducing energy consumption in homes and businesses. It usually comes in rolls(Bundles) or slabs(Boards).