It typically costs about $1.50-$3 per square foot to install roof insulation, depending on the type of insulation and the accessibility of the roof. In terms of saving money on energy costs, roof insulation is one of the best investments you can make. A well-insulated home can save up to 30% on heating and cooling costs.

It depends on the size and type of roof, but typically, insulating a roof costs between $0.50 and $2.00 per square foot. Insulating a roof can help reduce heating and cooling costs by up to 30%. It's also a good way to improve your home's overall energy efficiency, which can increase its resale value.