What is the Average Cost of Fiberglass Insulation? Average Fiberglass Insulation Price

There are two types of methods used to insulate buildings with fiberglass: sheet fiberglass and blown-in fiberglass. The installation of fiberglass sheets varies depending on what kind of fiberglass (brand, thickness) is being used. On average, the cost is less than a dollar per square foot before labor. With blown-in fiberglass the cost is on average $0.50 per square foot plus labor. For a small to medium job expect to pay at least $200 for installation by a professional.