To install fiberglass batts over existing insulation lay the batts perpendicular to the joists so they do not compress the insulation below.
How to add batt insulation to attic.
Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120.
According to the u s.
Affix rigid foam insulation to the attic side of the hatch or door.
Department of energy fibgerglass batts have an r value of 3 2 per inch while loose fill fiberglass.
You can add loose fill on top of fiberglass batts or blankets and vice.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
Add the right kind of insulation.
Multiply the number of inches of insulation by the r value per inch.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
The vapor retarder on top of or between layers of insulation can trap moisture.
Attic hatch or door.
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.
Pull down stair or ladder.