Single side foil/film-scrim kraft paper is widely used materials for wall facing. It is one side aluminum foil laminated with Kraft paper, and it is reinforced by glass fiber in the middle. It gives you better insulation result than you thought.
• ASTM E84: 5/10 Flame/Smoke Rating
• Perm 0.02
• Tri-directional reinforcement
• FSK (Aluminum Foil/Scrim/Kraft) facing
• Facing/wrap for various types of insulation