Atlas ACFoam-III Grade-II Polyiso CGF Roof Insulation, 3 in. x 4 ft. x 4 ft., 20 psi
Regular price $684.293 in. Polyiso Roof Insulation Board, 4x4, 20 psi
Closed-cell polyisocyanurate roof insulation with fiber-reinforced organic felt facers for durable thermal performance. This 3-inch board delivers long-term thermal resistance (LTTR) in a compact 4 ft. x 4 ft. sheet, ideal for commercial and residential roofing assemblies.
Key Features:
- Durable Construction: Closed-cell polyiso core bonded to non-asphaltic, fiber-reinforced organic felt facers for strength and moisture resistance
- High Compressive Strength: Grade-II 20 psi rating supports typical roofing loads
- Thermal Efficiency: Designed to provide long-term thermal resistance (LTTR) across roofing systems
- Code Compliant: Meets major standards including ASTM C1289, CAN/ULC-S704, UL and FM approvals, Miami-Dade and Florida Product Approvals
- Convenient Size: 3 in. thickness in a 4 ft. x 4 ft. board for easy handling and layout
Specifications Table:
| Specification | Details |
|---|---|
| Product Name | ACFoam-III Grade-II Polyiso CGF Roof Insulation |
| Dimensions | 3 in. x 4 ft. x 4 ft. |
| Thickness | 3" (76.2 mm) |
| Length | 4' (1220 mm) |
| Width | 4' (1220 mm) |
| Compressive Strength | 20 psi (Grade-II) |
| Core Material | Closed-cell polyisocyanurate (polyiso) |
| Facers | Non-asphaltic, fiber-reinforced organic felt facers |
| Area Coverage | 256 sq. ft. per unit |
| Weight | 10 lb (per item listed) |
| Style | Polyiso |
| Applicable Standards/Approvals | ASTM C1289; CAN/ULC-S704; CCMC No. 12423-L; UL Certified for Canada; UL 1256; UL 790 (ASTM E108); UL 263 (ASTM E119); UL 1897; FM 4450/4470; IBC Chapter 26 & NBC; California State; Miami-Dade County Approved; Florida Product Approved; Greenguard Certified; RCI Approved; NRCA Approved; AIA Approved; U.S. Green Building Council Member |
Frequently Asked Questions (FAQ):
Q: What are the board dimensions and thickness?
A: Each board is 4 ft. x 4 ft. with a 3 in. thickness.
Q: What is the compressive strength rating?
A: Grade-II board with a 20 psi compressive strength.
Q: What facers are used on this insulation?
A: Non-asphaltic, fiber-reinforced organic felt facers are integrally bonded to the polyiso core.
Q: Which codes and standards does it meet?
A: Complies with ASTM C1289 and CAN/ULC-S704 and carries multiple UL and FM approvals, plus Miami-Dade and Florida Product Approvals.
Q: Where can I find technical documentation?
A: Product data sheet, SDS, fastening guide, specification guide, EPD, and approvals are available via Atlas resource links.
Sculpted Warmth for the Modern Roofline
This polyiso board streamlines the silhouette of a roof while quietly elevating performance. The fiber-reinforced felt facer offers a refined, matte plane that layers beautifully beneath membranes. Pair it with crisp metal edge details to create an intentional, tailored profile. Consider it a discreet luxury—essential insulation that perfects comfort and form.
Choose Atlas ACFoam-III to add reliable thermal performance and code-ready strength to your next roofing project.
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