Is it cheaper to spray foam yourself?

It can be cheaper to spray foam yourself for small jobs but not necessarily for large jobs, as DIY kits cost more per board foot than professional bulk materials, but you save labor, similar to DIY organizing versus hiring organizer. For small areas like rim joists, small garage, or sealing gaps, DIY spray foam kits like Froth-Pak 200 or 650 board foot kits costing $350 to $700 can be cheaper than hiring pro with minimum charges of $500 to $1,000, so DIY saves money for under 500 square feet. For large jobs like whole house or 20x20 garage walls plus ceiling, professional installation is often cheaper per square foot, as pro cost $1.50 to $3.50 per sq ft installed for open or closed cell, while DIY kits cost $3.50 to $5.50 per sq ft material only, plus need protective gear, respirator, and cleanup, and risk of improper application leading to waste or mold if substrate wet, requiring HEPA filtration for safety. Professionals have equipment, experience, and warranty. So cheaper to DIY for small areas under 500 sq ft where pro minimum makes pro expensive, but for large areas over 1,000 sq ft, professional is often cheaper per square foot and better quality, with less risk, so evaluate size, DIY kits cheaper for small, pro cheaper for large.