Atlas EnergyShield Ply Glass-Mat Faced Polyiso Insulation is a high-performance insulation solution designed for both residential and light commercial construction. It delivers continuous insulation with a nailable substrate, making exterior walls more energy-efficient and structurally robust—perfect for Type V construction, retrofit projects, or new builds.

Key Features & Design

• Nailable Substrate: Offers ease of installation with compatibility for direct mechanical attachment of cladding.
• High Compressive Strength: 20 psi according to ASTM D1621, ensuring durability and resistance to deformation under load.
• Low Flame Spread & Smoke Development: Flame spread index < 75 and smoke development < 450 (ASTM E83/UL 723), enhancing safety in case of fire.
• Moisture Resistance: Less than 1% water absorption by volume, reducing risk of water damage and mold growth.
• Thermal Stability: Less than 1% linear change across -100°F to +250°F, maintaining performance in extreme conditions.
• Environmental Compliance: Meets ASHRAE 90.1, IECC Section 402, and IBC Section 2603 for versatile code compliance.
• Service Temperature Range: -100°F to +250°F, ensuring reliable performance in diverse climates.
• Versatile Substrate for Claddings: Designed to serve as a dependable substrate for mechanical attachment of diverse claddings.
• Applications: Ideal for exterior framed walls with wood or steel studs as well as exterior walls of masonry or concrete.

Available Sizes and R-Values

Sheets measure 4 ft x 8 ft and are available in multiple thicknesses to fit your project needs:

• 1.125 In — 1344 Sq Ft per pallet; 42 sheets per pallet; R-3.8
• 1.625 In — 928 Sq Ft per pallet; 29 sheets per pallet; R-6.8
• 2.125 In — 704 Sq Ft per pallet; 22 sheets per pallet; R-9.8
• 2.625 In — 544 Sq Ft per pallet; 17 sheets per pallet; R-12.9

Whether you're upgrading an existing building or designing a new one, Atlas EnergyShield Ply Glass-Mat Faced Polyiso Insulation helps boost energy efficiency and structural integrity while keeping installation practical. It’s sturdy, dependable, and a little bit humble in its performance—because sometimes the best insulation is the one you hardly notice.