What is the most common type of material used in batt insulation?

Fiberglass is the most common type of material used in batt insulation due to several key properties. It is lightweight, which makes it easy to handle and install in various spaces, such as walls and attics. Additionally, fiberglass batt insulation has a high thermal resistance or R-value, which helps improve energy efficiency by reducing heat transfer. It is also non-combustible, which contributes to safety in residential and commercial buildings.

Another reason for the widespread use of fiberglass is its cost-effectiveness. It tends to be less expensive compared to other insulation materials, making it an attractive choice for many builders and homeowners. The availability of pre-cut batts in standard sizes further simplifies the installation process, leading to its popularity in the construction industry.

Given these advantages, fiberglass has established itself as the go-to material for batt insulation, making it the most commonly used option in this category.