Blow-in insulation is the popular When it comes to attics. It comes in cellulose, fiberglass and mineral wool with compatible R-values.
The material used for blow-in locks the heat inside. One contributes to the green environment also with blow-in insulation.
It saves energy without harming the environment. This has fire resistance properties too. The fire-resistant element is highly required in attic. Fiberglass which is hard to ignite is a supporting element protecting the building in case of fire.
It demands proper installation by professionals with special equipment and safety measures.