The rest of the insulation market exhibits these characteristics: air-permeable, will sag and settle and compress over time, and incurs a high likelihood of improper installation. Cellulose, rock wool, blown-in-fiberglass, bib’s (blown-in-blankets), and denim (literally ground-up blue jeans) are generally cheaper in retail price, but will cost more month to month than the upgrade to spray foam insulation. Although R-Values are similar, spray foam will outperform the rest of the insulation market on comfort, air-quality, utility savings, sound abatement, and will increase the overall value of your property. These qualities make spray foam your insulation investment.