The R-value measures the heat resistance of an insulation. The high R-value of attic insulation provides energy savings by reducing heat loss in winter. According to the 2021 New Jersey Residential Code, R-49 to R-60 are the required R-values for Attic Insulation NJ. The cost of attic insulation in New Jersey is $1.5 to $3.5 per square foot installed. NJ attic insulation costs around $2700 to $6300 for a 1800-square-foot attic. The cost of rolled insulation…