blown in insulation, definition of

There are numerous ways to add a layer of insulation between your interior living spaces and the outside world. Blown-in insulation (also called blown-in batt) is composed of loose insulating fibers such as fiberglass, foam, or cellulose. While rolled or batt insulation might leave voids through which air can pass, blown-in types tend to fill all crevices, making it a more energy-efficient choice.

Blown-in insulation is generally installed by a professional.