Home insulation and energy efficiency improvements
Before spending thousands on solar or HVAC, check your insulation. Compare attic, wall, and floor insulation types, costs, R-values, and payback periods - often the fastest-paying home upgrade.
TLDR: Attic insulation costs $1-$3 per square foot. DIY batts are cheapest ($0.50-$1/sqft). Blown-in provides better coverage. R-38 to R-60 is recommended for most climates.
TLDR: Professional energy audits cost $200-$500 and identify $500-$2,000/year in potential savings. Many utilities offer free or subsidized audits. Here's what happens during one.
TLDR: Spray foam costs $1.50-$3.50 per square foot (open-cell) or $3-$6 (closed-cell). It offers the highest R-value per inch and excellent air sealing. Best for attic roof decks, crawlspaces, and rim joists.