How To Roll Faced Insulation Attic

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How to roll faced insulation attic.

When adding more insulation to an attic that already has insulation use unfaced insulation. Cut the insulation roll or batt to fit the length of the framing cavity if necessary. Use our roll insulation calculator to estimate the amount of wall insulation crawlspace insulation or attic insulation you need for your project. Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used.

Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Gaps in the attic or between the lower floors and the attic will let heated or cooled air escape to the great unconditioned outdoors making any insulation you add essentially useless. Lay the batts across the ceiling joists covering the existing insulation. Continue laying down the insulation making sure the batts are pressed tightly together at all edge and end joints.

If the attic doesn t have any existing insulation use faced insulation with the paper facing toward the heated living space. The batting material must be faced and at least as thick as the joists are wide so the batting is nearly flush with the top of the joists. Overlap the seams by about 12 inches and run the plastic up the walls at least 6 inches. Check the insulation manufacturer s instructions for the necessary thickness of plastic.

Set a t square or metal straightedge over the insulation and press it down firmly. Gather a dust mask gloves and eye protection and wear them along with a long sleeved shirt when working with batting insulation. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. To cut thick batts or rolls of fiberglass insulation easily use an extendable utility knife that has snap off blades.

In either case get an extra bag or roll you really don t want to run out when you re almost done putting it in. The fiberglass often used in batting causes skin and respiratory. Use a board to compact the insulation and provide a straight edge for cutting. While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic.

The number one prep step. Spread plastic sheeting over the crawlspace to prevent ground moisture from entering the area.