It s important to use the right type of insulation to prevent moisture problems in your attic.
Faced or unfaced insulation in attic over garage.
The facing contains a thin layer of asphalt which acts as a vapor barrier to block moisture.
The insulation will keep the naturally hot or cold air in the garage and the artificially warmed or cooled air in the room above it.
The same applies to faced unfaced and other kinds of insulation products.
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.
The primary reason to insulate any part of the home is to provide a thermal barrier between conditioned heated or cooled interior space and the outdoors or unheated spaces such as an unfinished.
Add vapor retarder to avoid problems arising from the condensation of water droplets on it especially during winters.
Insulation is used reduce the transference of heat between conditioned area your house and non condition areas garage and outdoors.
If you decide to use faced batt insulation instead fit it facing toward the room above the garage.
Here s what you need to know about the facing on attic insulation.
A garage attic also should be insulated is if there is an air conditioned room above the garage.
After insulating the attic of your garage your garage will be the same temperature as the outside in the shade.
Attic insulation is available with and without a paper facing.
It s sold in pre cut batts and long blankets that fit between wall studs and ceiling joists.
Fiberglass is the most commonly used type of insulation in garages just as it s the most popular type in homes.
Facing is a thin layer of paper or plastic attached to one side of batting insulation which is sold in a roll.
Before installing insulation in garage walls clear the area inside your garage of any obstacles.
Simply peel the facing paper off the top layer of insulation.
You can also get loose fill fiberglass which it suitable for blowing into a garage attic space above a finished ceiling.
The best choices for this type of application include comforttherm kraft faced or unfaced with a separate vapor retarder film placed over the insulation.
If you do not heat or cool an area it is considered to be unconditioned.
For many contractors the decision to use one kind of insulation over the other depends solely on preference rather than a by the book decision making process.