Fiberglass Batt Insulation: Complete Buying Guide 2026
Fiberglass batt insulation is the most common insulation type in residential construction. Pre-cut to fit standard stud bays, it provides reliable thermal performance at an affordable price point. In 2026, fiberglass batt insulation prices average $0.70 per sq ft, with a typical range of $0.40 to $1.20 depending on your region, supplier relationships, and order quantity.
When budgeting for a project using fiberglass batt insulation, factor in approximately 8% additional material for waste, plus labor costs averaging $0.60 per sq ft for professional installation. A typical project using this material runs approximately $1,800 including both materials and labor.
With an expected lifespan of 80 years, fiberglass batt insulation represents a cost of approximately $0.01 per sq ft per year of service life. This exceptional longevity makes it one of the most cost-effective materials when measured over its full lifespan.