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fiberglass

Fiberglass batts come in different thicknesses and widths. Unlike loose-fill insulation, batts won’t blow or shift around easily. Batts are easy to move out of the way if you need access to attic framing, wiring, or light fixtures mounted in the ceiling below. Careful installation is required to eliminate energy-wasting air spaces, and installation is more time-consuming because batts must be cut and placed by hand.