1 The backslash divides the file name from the path to it, and one directory name from another directory name in a path. 2  You cannot use a backslash in the name for the actual file or directory because it is a reserved character that separates the names into components.
1 Open-cell spray foam costs $.40 to $.70 per board foot. 2  Closed-cell spray foam costs $.75 to $1 per board foot. 3  Expressed in terms of square feet, spray foam installation cost is $1.50 to $3.00 per square foot (for an average-sized home between 2,000 to 2,500 square feet, thatâs a total cost of $3,000 to $7,500.pray Foam Insulation Prices. While the function of spray foam insulationâto keep buildings warm during cold weather and cool during warm weatherâis the same as traditional pink fiberglass insulation, thatâs where the similarities between the two materials end.
@ $2.60/sq. ft. This amounts to $6,240 for 3 spray on foam with an R value of approximately 20-21. 2X4 inch walls with 16 Bats has R of 11. Cost for insulation is $0.38/sq. ft for material plus installation, which you can do yourself.Cost for same area with bats is $912.00.t cost me right at 5k for the walls on a 2400 sq ft house. Walls were 9 ft and that included rim joists.This was poly foam at 3 inches thick.I also used one inch sheeting on the outside for a total of 4 inches of foam. We used blown in fiberglass in the attic 15 inches thick.