Rigid Foam Insulation: Complete Buying Guide 2026
Foam board insulation for continuous insulation on foundations, walls, and roofs. In 2026, rigid foam insulation prices average $0.80 per sq ft, with a typical range of $0.40 to $1.50 depending on your region, supplier relationships, and order quantity.
When budgeting for a project using rigid foam insulation, factor in approximately 10% additional material for waste, plus labor costs averaging $0.00 per sq ft for professional installation. A typical project using this material runs approximately $2,000 including both materials and labor.
With an expected lifespan of 30 years, rigid foam insulation represents a cost of approximately $0.03 per sq ft per year of service life. This solid lifespan provides good value for most residential and commercial applications.