Asked by: Ala Hilbranshome and garden indoor environmental quality
How do you install fiberglass foil faced insulation?
Last Updated: 9th June, 2020
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Thereof, how should fiberglass insulation be installed?
Gently push the insulation into the cavity, but do not force it or compress it, which reduces its insulating value. The insulation should fit snugly into the cavity with no gaps or spaces, filling it from top to bottom (or end to end). Fold out the paper flange along one side of the insulation.
Similarly, how do you install unfaced fiberglass insulation in walls? 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.
Keeping this in view, which way does the foil face on insulation?
Foil insulation underlayment is recommended under a metal roof, and in most cases, the shiny side should be facing up, but there's a catch. Foil insulation is a radiant barrier, and it works by reflecting heat from the metal, but for it to do its job, there has to be a layer of air between the roofing and the foil.
Do I need faced or 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. State and local building codes determine vapor retarder requirements.