Insulating interior walls isn't as common, although it offers homeowners some energy saving and sound-dampening benefits. The best time to insulate all walls is during new construction, but it's possible to add insulation to existing walls without tearing off the drywall.
INSTALLING FACED INSULATION WITHOUT USING STAPLES
The insulation must fit snugly at the sides and ends. Some CertainTeed products, such as SpeedyR, are prodcuced without stapling flanges specifically to be friction fit, and do not need to be stapled.Unfaced insulation is
insulation only, for
use when a vapor retarder isn't needed.
Unfaced Insulation
- Use unfaced insulation if there is already a moisture barrier in place (such as a layer of faced insulation) or if a moisture barrier is not required.
- Use when adding to existing insulation.
Is using unfaced fiberglass insulation properly installed, with a continuous poly vapor barrier a better way to handle the situation. It covers the code and properly installed and sealed should prevent moisture vapor from entering the wall cavity through the sheetrock.
In crawl spaces, unfaced insulation is generally only used when adding to existing insulation. It's important not to lay faced insulation on top of faced insulation. Doing so can create a moisture trap.
Fiberglass batts, foam or cellulose can be used to insulate the interior walls. The third area that needs proper insulation is the floors.
Faced insulation has Kraft paper on one side to act as a vapor retarder and help prevent moisture from entering the wall cavity. Unfaced insulation is insulation only, for use when a vapor retarder isn't needed.
The easiest place to add insulation without affecting drywall is in an attic, under the roof. That also is where added insulation is most beneficial. One option is to add loose fill insulation such as cellulose, rock wool or fiberglass beads. These insulations are available in bags at building supply stores.
How to Cover Fiberglass Insulation. If you decide to cover fiberglass in an occupied living space, make sure you choose a permeable barrier that won't trap moisture. Seal the insulation by stapling a polymembrane sheet over it. Install paneling or sheetrock over insulation located in the wall.
Faced insulation is a type of blanket insulation that is typically made of fiberglass. It differs from unfaced insulation only in that it has a vapor barrier (also called vapor retarder) that blocks moisture from moving from one space to another. The vapor barrier is usually made of kraft paper.
“Fiberglass insulation should never be left exposed in an occupied area, according to the American Lung Association,” says ALA's Godfrey. “Exposed fiberglass insulation, once in the air, does cause respiratory reactions, such as dry, scratchy throat and coughing, as well as acting as a skin and eye irritant.
What Is the Difference Between Faced and Unfaced Insulation? Faced insulation has Kraft paper on one side to act as a vapor retarder and help prevent moisture from entering the wall cavity. Unfaced insulation is insulation only, for use when a vapor retarder isn't needed.
Batts: Generally made of fiberglass, insulation batts and rolls are available either with face coverings or without. Brown Kraft paper is a common facing. Fire-retardant foil sometimes is used to cover batts that will be left exposed in unfinished spaces, such as a garage or basement.
Yes, insulation is always worth doing no matter if you heat the garage or not. My detatched garage is well insulated. In the summer, it stays 20 or more degrees below outside temperature just by keeping the doors closed. In the winter, the garage stays 30-40 degrees above outside temperature with no heat added.
Place unfaced insulation on top of existing material, such as loose-fill cellulose. Press the insulation firmly into place between joists, taking care to not compress the fiberglass and reduce its efficiency. Fasten batts loosely to perpendicular joists with plastic straps just to keep it from shifting.
The best insulation material for crawl spaces is rigid foam insulation board. Instead of installing the foam insulation between floor joists in the crawl space, the foam board is installed against the crawl space foundation walls.
The standard installation of a plastic vapor barrier is between the studs and the drywall, but there are some exceptions to this. In exterior walls that are below-grade, like basement walls, plastic should not be used at all.
Without a moisture-proof material to protect the insulation and framing within the wall, hot and cold battle, moisture forms, and mold and rot take advantage of the result. Install an unbroken sheet of polyethylene vapor barrier to prevent it from happening.
Use R-19 or R-21 kraft-faced fiberglass insulation for two-by-six (2x6) walls. This combination ensures that the insulation is neither too loose nor too tightly packed within the walls. Two-by-four (2x4) stud walls with true 4-inch depth.
In an upside down installation, where the paper faces the unheated portion of the home, moisture from the humid inside air can condense and become trapped inside of the insulation during cold winter months. This will likely result in fungal growth (mold) and rot.
Faced insulation has a vapor barrier or a vapor retarder (the facing) that helps prevent moisture from moving from one space to another. The facing also helps protect the surface, hold the insulation together and fasten the material to building components.
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.
Unfaced Insulation. "Facing" is a layer attached to roll or batt insulation as a vapor barrier to help protect the living space from excess humidity or moisture.
