Can I Use Unfaced Insulation In Walls. If you're using unfaced insulation in an area where a vapor barrier is required or recommended, you may be able to add your own barrier using plastic for insulating the walls of your crawl space, most experts recommend a rigid foam board. Like blanket or batt insulation, foam board comes in faced.
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The insulation there now is in good shape, but is more than 30 years old. These batts can come faced or unfaced. While faced insulation is stapled to the wall studs, unfaced fiberglass insulation is installed slightly differently but offers the same benefits.
Using faced and unfaced crawl space insulation with plastic—in some cases, property owners will use unfaced insulation in conjunction with plastic sheeting.
Unfaced eps for the foam layer. Increasing the amount of insulation in the walls during a renovation by increasing wall thickness from a nominal 4 inches to 6 inches. Adjoining batts should be butted snugly together. Use unfaced sheets, or remove the film from the rigid foam board prior to installation, particularly to allow some breathability at the band joist area.
