Alternatively, spray foam attic insulation costs about $1,500 to $3,500. Photo: bobvila.com Additional Costs and Considerations No two spray foam insulation projects are the same, ...

Installing spray foam to an uninsulated attic is generally the cheapest while applying it to basement walls tends to be the ...

As a result, the attic insulation cost per square foot of spray foam insulation runs slightly higher than other types, around $3 to $5. Structural Insulated Panels ...

Spray foam insulation costs depend on the type, but traditional spray foams usually range from $0.44 to $1.60 per board foot. For reference, a board foot is 1 square foot by 1 inch thick . Open-Cell ...

Cons: It has a modest R-value and is more permeable to air than, say, spray foam insulation, ... Attic The attic is where you’ll get the biggest return on your investment.

With all that being said, my recommendation would be to go with an unvented attic, meaning that we would spray-foam, and encapsulate the entire attic space. We get multiple benefits from that.

Spray foam insulation has been used to stop heat escaping from roofs, lofts and attics for decades and comes in two forms. Closed cell spray foam is rigid once set.