You should only use faced insulation as the first layer of insulation.
Faced or unfaced insulation in attic over garage.
Add vapor retarder to avoid problems arising from the condensation of water droplets on it especially during winters.
Facing is a thin layer of paper or plastic attached to one side of batting insulation which is sold in a roll.
The kraft paper on one side of faced insulation keeps moisture from spreading throughout the walls or ceiling.
If the attic doesn t have any existing insulation use faced insulation with the paper facing toward the heated living space.
Simply peel the facing paper off the top layer of insulation.
Whether you choose faced or unfaced insulation for the attic depends on the.
When local building codes require a vapor retardant faced insulation is one of the best options.
When adding more insulation to an attic that already has insulation use unfaced insulation.
The kraft paper itself is highly flammable.
If you decide to use faced batt insulation instead fit it facing toward the room above the garage.
As you ve discovered since you already had insulation in your attic the layer of new insulation you added should have been unfaced to prevent moisture from becoming trapped between the layers.
To make things safe cover your unfaced insulation with drywall to prevent the risk of a fire.