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.
I was discussing upgrade options with my GC and the insulation contractor. We talked about the pay back on spray foam insulation. The insulation contractor suggested I would see a better payback using 1/2 energy shield insulation board on all of the exterior walls.This would be in addition to 5 1/2 inches of R-21 Unfaced Fiberglass Batt Insulation.Does anyone have experience or thoughts on using insulation board on exterior walls.It seems like a pretty good option versus 2 of R-13.6 closed cell spray and 3 1/2 inches of R-11 unfaced fiberglass batt. The closed cell option is a $4500 adder.The house is in New Hampshire, so we have some pretty cold winters.he insulation contractor suggested I would see a better payback using 1/2 energy shield insulation board on all of the exterior walls. This would be in addition to 5 1/2 inches of R-21 Unfaced Fiberglass Batt Insulation. Does anyone have experience or thoughts on using insulation board on exterior walls.