It needs to be unfaced.
Puttine fiberglass batts in attic.
Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.
Blown in fiberglass creates a seamless blanket in your attic.
Batts must be cut tightly and you can t have gaps.
Lay the batts across the ceiling joists covering the existing insulation.
Sloppy people aren t suited for this job.
Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation.
The fiberglass batts in the wall above it extend past the bottom of the wall cavity and fit loosely into the cavity of the 2 12 floor joists hiding the fact that there is no insulation in that void.
In this video this old house general contractor tom silva shows affordable ways to create an energy efficient attic.
Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used.
As you will most likely find the attic floor will have joists running along it and both the vapor barrier and batt needs to be cut accordingly to fit in between these joists.
Make sure you use an unfaced batt one without a paper or foil layer so the insulation does not trap moisture in the ceiling.
Either works but rolls are recommended to quickly cover the area in your attic which is important when just beginning to learn how to insulate your attic because it s easier and more accessible for beginners.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
Most of insulation comes in rolls or precut fiberglass batts.
Cut fiberglass batts to fit tightly between floor joists.
Batts fiberous rolls or sheets of owens corning fiberglass insulation installed between the ceiling joists in the attic are one of the most effective energy upgrades the average.
If you use fiberglass over loose fill make sure the fiberglass batt has no paper or foil backing.
The first step in the insulation process involves cutting and laying onto the floor both the vapor barrier depending on climate and batt insulation.
Lightly press the batt down between the joists.
You can install fiberglass batts yourself right over existing insulation but follow these precautions.
Lay the fiberglass batt between the joists with the paper vapor barrier facing down toward the heated space.
While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic.
Wear a long sleeve shirt gloves eye protection and a dust mask.
