The cost to insulate your attic with Spray Foam in Denver, CO, ranges from $1.25 to $2.00+ per square foot depending on factors like: Type of foam used (open or closed cell SPF) Total square footage and surface type complexity.

Spray foam insulation mold problems are quite common. Especially with closed-cell spray foam, which is rigid. Mold and mildew can begin growing behind the insulation which can go unnoticed until it's already become a huge problem.

Closed cell spray foam has an R-value of R-7 per inch. In comparison, open cell spray foam has an R-value of R-3.8 per inch. Additionally, the materials have decidedly different densities. Open cell spray foam has a density of 0.5lb/ft³ whereas the density of closed cell spray foam is 2lbs/ft³.

Types. Spray polyurethane foam (SPF) insulation can be categorized into two different types: light-density open-cell spray foam insulation and medium-density closed-cell spray foam insulation. Both types of SPF are thermoset cellular plastics comprising millions of small cells.