how to add insulation to attic
Fiberglass insulation usually comes with a paper moisture barrier. Always make sure the vapor barrier is facing the heated portion of your home. If this were an attic, the barrier would be on the bottom. When adding insulation, you'll first want to bring the fiberglass up to the tops of the joists. To do this, use an unfaced insulation with no paper moisture barrier. Once you're level with the joist tops, you can add more insulation by running it at right angles to the joists.