A layered composite includes an insulation sheet and at least one scrim layer secured thereto. The at least one scrim layer may be embedded within the thickness of the insulation sheet, or bonded to a corresponding face of the insulation sheet, and have a tensile strength greater than that of the insulation sheet. As such, the scrim layer provides structural support to the insulation sheet as well as a trap for fibers or particles that may separate from the insulation sheet.