Faced Batt Insulation In Attic

Creating a moisture barrier.

Faced batt insulation in attic.

Faced insulation has a sheet of material attached to one side. Place a new layer of unfaced batts perpendicular to the old layer to cover any gaps in the lower layer. Kraft paper facing is by far the most common type of vapor barrier you can find pre attached to blanket insulation intended for installation in homes. That s how the barrier is made effective.

Unfaced insulation when adding more insulation to an attic that already has insulation use unfaced insulation. As a result of evaporation people breathing and plant respiration air carries some. The r factor of blown in fiberglass is usually 2 3 to 2 8 per inch of material. Always use unfaced batts both when laying product for the first time and to prevent moisture from becoming trapped between new and old layers of insulation.

The same is true for an attic floor. Once installed and expanded to the uniform manufactured thickness batts offer a known r factor. All kraft faced insulation is easy to cut with a sharp utility knife or insulation knife. Roll insulation is best for floors ceilings and roofs with a long joist or rafter bays and for tall walls.

Guardian r 13 kraft faced fiberglass insulation batt 15 x 93 106 6 sq. Kraft faced or paper faced insulation comes in batts and long rolls. Faced insulation if the attic doesn t have any existing insulation use faced insulation with the paper facing toward. Faced insulation has flanges on the outside of the batt that need to be stapled to the wall studs and joists.

The batts are precut to fit into cavities on standard 8 foot high walls. 8 bags model k91 view the owens corning attic insulation. This material may be kraft paper foil plastic or vinyl. You can buy them unfaced or simply remove the paper or foil backing.

Here s what you need to know about the facing on attic insulation. Blown in insulation thickness can vary in an attic space. This will lead to non uniform r values. Lay the batts across the ceiling joists covering the existing insulation.

The facing should aim down toward the living space. Unfinished or uninsulated attics need a layer of protection against air migration.