You can add loose fill on top of fiberglass batts or blankets and vice.
How to add batt insulation to attic.
Whether you live in a warm weather state as i do or in a cooler northern climate it s hard to stay comfortable and keep your energy bills in check if you don t have adequate insulation in the attic.
Department of energy fibgerglass batts have an r value of 3 2 per inch while loose fill fiberglass.
The vapor retarder on top of or between layers of insulation can trap moisture.
According to the u s.
To install fiberglass batts over existing insulation lay the batts perpendicular to the joists so they do not compress the insulation below.
Pull down stair or ladder.
Add the right kind of insulation.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
Attic hatch or door.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.
Affix rigid foam insulation to the attic side of the hatch or door.
Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.