Atlas EnergyShield Ref Foil Faced 2 Sides Polyiso Insulation delivers outstanding thermal performance for both residential and commercial projects. With dual-sided foil facing and a broad range of thicknesses, it’s built to improve energy efficiency from attics to exterior walls—and it’s tough enough to withstand extreme temperatures.

Key Features & Design

• Dual-sided foil facing on both sides to reflect heat, boost thermal resistance, and keep moisture in check—no drama required.
• Versatile thickness options suitable for interior and exterior use in walls, attics, crawlspaces, and more.
• High thermal efficiency—foil faced on both sides to reflect heat and reduce energy costs.
• Safety compliant—Meets ASTM E84 for flame spread and smoke development.
• Moisture resistance—Minimal water absorption and classified as a Class I vapor retarder, helping protect against dampness.
• Temperature resilience—Withstands extreme temperatures from -100°F to +250°F, making it suitable for diverse climates.
• Air barrier material—Qualifies as an air barrier when used in thickness greater than 1/2 inch, supporting energy conservation per IECC and ASHRAE 90.1.
• Applications—Ideal for continuous insulation over wood or gypsum sheathings and for retrofits over existing cladding; works well in interior/exterior walls, attics, crawlspaces, and masonry or concrete wall systems.

Available thicknesses and performance

• 0.5 In — 1,408 sq ft per pallet; 44 sheets per pallet; R-3.3
• 0.625 In — 1,152 sq ft per pallet; 36 sheets per pallet; R-4.1
• 0.75 In — 960 sq ft per pallet; 30 sheets per pallet; R-5
• 1 In — 736 sq ft per pallet; 23 sheets per pallet; R-6.5
• 1.5 In — 992 sq ft per pallet; 31 sheets per pallet; R-9.8
• 1.6 In — 928 sq ft per pallet; 29 sheets per pallet; R-10.5
• 2 In — 736 sq ft per pallet; 23 sheets per pallet; R-13.1
• 2.5 In — 608 sq ft per pallet; 19 sheets per pallet; R-16
• 3 In — 480 sq ft per pallet; 15 sheets per pallet; R-19.7
• 3.3 In — 480 sq ft per pallet; 15 sheets per pallet; R-21.2
• 4 In — 352 sq ft per pallet; 11 sheets per pallet; R-26