Batted fiberglass insulation is often used in residential construction because it is the most inexpensive insulation and provides the proper R-value needed to pass code. Truth is - fiberglass insulation is the least effective of all the insulation types available. As you can see, this insulation was yellow at one point, but the air leaks in the attic brought in outside dirt and caused the insulation to warp and no longer be effective. Dr. Energy Saver's certified inspectors will discuss the best insulation for your budget and your comfort needs. Contact us to schedule your free inspection and estimate today!