Selecting between open-cell and closed-cell foam is the most critical decision for your project's performance and budget. Closed-Cell Foam Texture Soft, spongy, flexible Dense, rigid, stable R-Value R-3.5 to R-3.8 per inch R-6.0 to R-7.0 per inch Cost (Board Ft) $0.35 – $0.75 $1.00 – $2.00 Moisture Breathable; needs vapor barrier Acts as a built-in vapor barrier Best Use Interior walls, soundproofing Exterior walls, attics, basements Top Buying Options
Buying spray foam insulation is a significant investment that can reduce energy bills by annually. Most whole-home projects cost between $1,500 and $6,000 for standard installations, though large or complex existing homes can reach $8,000 to $26,300 . Choosing the Right Type buy spray insulation
: Be aware that some mortgage companies and inspectors may view spray foam negatively if it obscures structural elements (like roof rafters), potentially affecting home sales later. Selecting between open-cell and closed-cell foam is the