What does "blown-in insulation" refer to?

Blown-in insulation refers to a method of installing insulation material where fibers or granules are blown into spaces using air or a mechanical blower. This technique allows for greater coverage and the ability to fill irregularly shaped cavities, ensuring that there are no gaps that could compromise thermal efficiency.

This insulation method is particularly effective for attics, wall cavities, and other hard-to-reach areas, as the blown-in materials can easily fill the voids and prevent air leakage. The installation process typically involves the use of cellulose, fiberglass, or mineral wool, which are blown into the space until the desired depth and density are achieved.

Other methods, such as using rigid boards or applying insulation as a liquid, involve different techniques that do not utilize the blowing action to install the material. Sealing ducts is a separate process focused on ensuring the efficiency of HVAC systems rather than insulating spaces. Thus, blown-in insulation is a specific application that leverages blowing technology to provide effective thermal insulation.