how should fiberglass insulation be installed

Which way should insulation face?

Regardless of whether fiberglass insulation is installed in a wall, attic, or crawlspace; the paper facing should always face toward the inside of the home. That's because the paper contains a layer of asphalt adhesive which prevents water vapor from passing through it.

How do you install Fibreglass insulation?

2:314:06How to Install Fiberglass Insulation | This Old House - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou want to start at the top. And go slow. Work your way. Down. And make sure you're filling theMoreYou want to start at the top. And go slow. Work your way. Down. And make sure you're filling the whole cavity with foam. Okay we took care of the walls we took care of the windows.

Which way is insulation supposed to be installed?

The first layer should have the facing against the drywall to act as a vapor barrier. (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.

Does it matter if insulation is faced or unfaced?

The Difference Between Faced And Unfaced Insulation Faced just means that kraft paper is attached to the insulation itself. The paper helps improve the sturdiness of the insulation so it doesn't fall down as much. Unfaced insulation is just as good as faced, but it doesn't have that paper attached to it.

Does insulation need to be stapled?

Stapling the insulation batts is not necessary to secure them in most cases. However, it is the easiest way to keep them in place, as most products are already equipped with tabs or strips for stapling into the framing joists.

Does fiberglass insulation need a vapor barrier?

Fiberglass Insulation Like other batt-type insulation, fiberglass has a predictable R-value if not compressed but is difficult to fit around obstacles without leaving gaps. In most climates, it needs a vapor barrier.

Does the foil side of insulation go in or out?

The reflective side of the board should be oriented to the exterior and the non- reflective white side should be oriented to the interior. EXCEPTION: If vinyl siding is to be installed over AP™ Foil- Faced sheathing, install foam boards with the white nonreflective side toward the vinyl siding.

What side of the insulation does the vapor barrier go on?

warm sideIn order to prevent condensation from forming, a vapor barrier should be placed on the warm side of your insulation to stop warm, moist air from condensing on a cold surface inside your wall.

When should you use unfaced insulation?

Unfaced insulation is great for new construction, remodels, walls, floors, ceilings, basements, attics and crawlspaces. It's best used for interior wall applications that do not face the outside and also in rooms that don't need moisture control, like living rooms, dining rooms and studies.

Is it OK to use faced insulation in attic?

When installing between the roof rafters of finished attic spaces, you can use either faced or unfaced batting. When using insulation that has paper or plastic batting, that moisture barrier should face outward toward the attic space.

What is the purpose of paper backing on insulation?

The Purpose of Insulation Facing The paper creates a vapor barrier that helps keep the water vapor in the warm, moist, heated indoor air from migrating outward into the wall or other structure. For this reason, faced insulation is typically installed on the "warm in winter" side of the wall.

How do you install insulation in existing walls?

If you find some insulation, cut out a 12- to 16-inch horizontal band of drywall or plaster midway up the wall. Then just pull out the old insulation. If you choose loose fill or expanding foam, it can go in through the same hole—though you'll need to make more holes along the top of the wall to complete the job."

How do you install insulation in walls?

2:265:35DIY Insulation Project: 2X4 & 2X6 Walls - YouTubeYouTubeStart of suggested clipEnd of suggested clipMost wall products have a stapling flange on the facing. Hold the flange against the inside edge ofMoreMost wall products have a stapling flange on the facing. Hold the flange against the inside edge of the stud. And staple if necessary the insulation should fit snugly against the studs.

How do you hold insulation in walls?

Snug-fitting insulation will stay put without fastening, but faced insulation is available with stapling flanges—extra paper facing along each side edge that allows you to staple it to the side of the wall stud. Open-faced insulation can't be stapled, so it needs to fit snugly for friction to hold it in place.

Can you install insulation yourself?

With certain types of insulation materials, installing your own insulation is definitely doable—and you can save money not hiring a professional. Installing fiberglass or mineral wool insulation are simple DIY projects. Other insulation types, such as spray foam insulation, require the use of a professional.