Insulating An Attic
A significant amount of heat is lost through the roof, which makes it an important area to insulate.
If your attic is unfinished and you're insulating it for the first time, start with the floor joists. If you're building a new home, install ceiling insulation from underneath before you put in drywall. You should use faced insulation if your home is humid, but use only unfaced insulation near chimneys and flues.
You can also insulate your unfinished attic with blow-in insulation, which requires specialized equipment but can be easier and less time-consuming than laying batts or rolls. You can rent this equipment from your local retailer that you buy your insulation from.