QUESTION: List some materials that are used to prevent conduction? Answer: Insulation helps to prevent that transfer of heat. Many different materials are used for insulation. Engineers often use fiberglass, wool, cotton, paper (wood cellulose), strawand varioustypesoffoams to insulate buildings. A layer of trapped air can serve as insulation, too! QUESTION: What are they called as a group? Answer: There are called insulator.