(The general rule for insulation is that the facing always goes toward the conditioned space.) The second layer of insulation should be unfaced so that moisture doesn't collect between the layers.
What happens if insulation is installed backwards?
So if it is installed upside down, the paper moisture barrier can actually keep moisture in-between the paper and the sub-flooring. This can lead to mold issues, as well as structural deterioration. Also, the paper is flammable so not properly installing it can create a fire hazard.Dec 20, 2019
Which side does the vapor barrier go on?
Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions: the inner surface in colder climates and the outer surface in hot, humid climates.Dec 30, 2018
Which way should insulation face in a garage?
You can use either faced insulation or unfaced insulation. However, if you use an unfaced insulation you will need to add a plastic vapor barrier over the garage walls after installing the insulation. If you used faced insulation the paper side should face the interior of the garage.
What side does insulation go on?
Picking the right face is essential with fiberglass insulation that has a vapor barrier (meaning with Kraft paper or foil attached on one side). It should always face the warm-in-winter side. Thus, in cold climates, it should face the interior; in hot humid climates, it should face the exterior.Mar 25, 2014