Do you know the difference of open and closed cell spray foam Open-Cell(ideal in homes)is light weight,pliable and easy to work with. It also expands to as much as 100 times over making it ideal for homes because it gets in the books and crannies in attics, crawl spaces and joists. It also reduces sound waves much better than closed Cell. R-Value of open cell ranges from 3.5-3.6 per inch . Closed-Cell(Ideal in barns and roofs)is dense and makes exposed walls more rigid and durable. It is also 100% moisture impermeable. Higher R-value per inch. It’s also the most expensive residential insulation.Closed-cell R-Value is 6.5 per inch.