Even in a pretty well insulated home, air sealing and duct sealing will make a difference. Energy Star recommends R49 to R60 insulation for Eastern Shore Maryland and Delaware. Insulating to R60 with cellulose insulation and adding Radiant Barrier keeps the home cooler in the summer and warmer in the winter. Protect your duct work from the harsh summer attic temperatures with Radiant Barrier or the Dr. Energy Saver SuperAttic Conversion System.