Batt Insulation is one of the common types of insulation used. It comes in the form of pre-cut rock or fiberglass. Batt insulation can be used to insulate floors, walls, ceilings and attics. More often, it is used to fit between the framing of the home. Batts are sold in a variety of R-values. They are also manufactured in different sizes for easy transportation.
Batts is the most comfortable and cheapest way to insulate new walls. However, they are often poorly installed leaving small gaps. This reduces the efficiency of insulation to as much as 25%.