What is batt insulation primarily made of?

Batt insulation is primarily made of fiberglass or mineral wool, which are both effective materials used to enhance thermal insulation in buildings. Fiberglass batt insulation consists of fine glass fibers that trap air, providing excellent thermal resistance and preventing heat loss or gain. This is important in maintaining energy efficiency within structures, as it helps keep homes warmer in winter and cooler in summer.

Mineral wool, on the other hand, is derived from volcanic rock or recycled slag and offers similar thermal benefits. Both materials are designed to minimize airflow and block heat transfer, making them highly suitable for insulation purposes.

The other materials mentioned in the other options, such as plastic, metal, and wood fibers, do not serve the primary insulation role that fiberglass or mineral wool provides effectively. While they have their uses in specific construction applications, they do not offer the same thermal insulation benefits as batt insulation made from fiberglass or mineral wool.