Atlas ACFoam-II Polyiso Roof Insulation Board 1.5 in x 4 ft x 8 ft (Grade II, 20 psi)

ACFoam-II 1.5 in Polyiso Roof Insulation Board (4 ft x 8 ft) Atlas ACFoam-II is a rigid, closed-cell polyisocyanurate (polyiso) roof insulation board designed to deliver long-term thermal performance. Its fiber-reinforced organic felt facers add durability for commercial roofing assemblies. Key Features: Please check the Product Data Sheet Here Specifications Table: Specification Details Brand Atlas Product line ACFoam II Insulation type Rigid foam insulation board Core material Closed-cell polyisocyanurate (polyiso) foam Faser/facer type Non-asphaltic, fiber-reinforced organic felt facers Thickness 1.5 in (1-1/2 in / 38.1 mm) Nominal size 4 ft x 8 ft Length 8 ft (2440 mm) Width 4 ft (1220 mm) Grade / compressive strength Grade II (20 psi) Style Polyiso Applicable standards / approvals (as listed) ASTM C1289; CAN/ULC-S704; CCMC No. 12464-L; UL Certified for Canada; UL 1256 Classification; UL 790 (ASTM E108); UL 263 (ASTM E119); UL 1897; FM 4450/4470 Approved; IBC Chapter 26 & NBC; Miami-Dade County Approved; Florida Product Approved; UL Greenguard Gold Certified; RCI Approved; AIA Approved; U.S. Green Building Council Member; National Roofing Contractors Association Unit of measure Sheet (SH) Frequently Asked Questions (FAQ): Q: What size and thickness is this board? A: This board is 1.5 in thick and measures 4 ft x 8 ft. Q: What is the insulation material and facer type? A: It has a closed-cell polyiso foam core with non-asphaltic, fiber-reinforced organic felt facers. Q: Is this a high-compressive-strength board? A: This is Grade II (20 psi) polyiso roof insulation. Q: How is it typically sold? A: The unit of measure is a single sheet (4 ft x 8 ft). Q: What standards does it meet? A: Listings include ASTM C1289 and other approvals/certifications as provided in the product standards list (verify project requirements). Quiet Strength for the Spaces You Don’t See Luxury begins with the invisible architecture—surfaces that hold temperature, hush, and comfort with effortless ease. ACFoam-II brings that refined backbone to the roofline: a crisp 4′ x 8′ plane with a durable felt facer and a high-performing polyiso core. Pair it with a clean, modern envelope and you get interiors that feel composed—cooler in heat, warmer in chill. It’s the kind of behind-the-scenes essential that makes everyday living feel undeniably elevated. Choose Atlas ACFoam-II 1.5 in polyiso boards to build a roof assembly with durable handling and long-term thermal performance.

High Thermal Performance Closed-cell polyiso core designed to provide long-term thermal resistance (LTTR).

Durable Facers Integrally bonded, non-asphaltic fiber-reinforced organic felt facers for jobsite toughness.

Roofing System Versatility Commonly used in commercial roof assemblies where rigid insulation is required.

Jobsite-Friendly Format 4 ft x 8 ft boards are easy to stage, cut, and place.

Code/Standard Compliance Manufactured to meet ASTM C1289 and other listed approvals/certifications (varies by assembly).