Insulation costs $1.00 to $4.50 per square foot. The average cost to insulate a house is $1,600 to $8,000. Insulation material prices are $0.50 to $2.80 per sq. ft.| HomeGuide
Blown-in insulation costs $1.00 to $2.80 per square foot. Blown-in attic insulation costs $900 to $3,600. Blown-in wall insulation costs $1,900 to $7,800.| HomeGuide
The cost to insulate a garage is $0.50 to $3.00 per square foot installed, depending on the size, height, and insulation type.| HomeGuide