Massachusetts Unrestricted Construction Supervisor License Practice Test

What type of insulation requires labels marking its thickness?

1. Batt insulation

2. Spray foam insulation

3. Blown-in or sprayed insulation

4. Fiberglass rolls

The correct answer is: Blown-in or sprayed insulation

The correct option highlights that blown-in or sprayed insulation requires labels that indicate its thickness. This is primarily due to the nature of how this insulation is applied, which can vary significantly based on the application technique and the specific product used. When installing blown-in insulation, precision in application thickness is crucial, as it affects the insulation's thermal performance, R-value, and overall effectiveness in controlling energy costs. Labeling helps installers ensure that the correct thickness is achieved during application, which is essential for compliance with building codes and achieving the desired energy efficiency. In instances where insulation is applied as a spray or blown-in product, variability is inherent, thus necessitating clear labeling of the material to guide installers. In contrast, other types of insulation, such as batt insulation and fiberglass rolls, typically come in standardized sizes and thicknesses, making specific thickness markings less critical for installation. Therefore, the requirement for labeling is unique to blown-in or sprayed insulation due to its installation method and variability.