1-4/5" Polyiso Roof Insulation Board, 4' x 4'
Closed-cell polyisocyanurate roof insulation with a fiber-reinforced organic felt facer for durable, energy-efficient roofing assemblies. The ACFoam-II board delivers reliable long-term thermal resistance and is available in multiple thicknesses for design flexibility.
Key Features:
- Energy-Efficient Polyiso: Closed-cell polyisocyanurate core provides strong LTTR thermal performance for roof systems.
- Durable Facers: Non-asphaltic, fiber-reinforced organic felt facers enhance rigidity and compatibility with roofing membranes.
- Sized for Easy Handling: 4 ft. x 4 ft. boards at 1-4/5 in. thickness streamline installation and staging on the roof.
- Code-Compliant: Meets major standards and approvals including ASTM C1289, UL, FM 4450/4470, Miami-Dade, and Florida Product Approval.
- Lightweight Board: Approximately 7 lb per piece to help reduce labor fatigue during placement.
Specifications Table:
| Specification | Details |
| Product name | 1-4/5" x 4' x 4' Polyiso Roof Insulation |
| Brand | Atlas |
| Model / Series | ACFoam-II |
| Thickness | 1-4/5" |
| Length | 4' (1220 mm) |
| Width | 4' (1220 mm) |
| Core material | Closed-cell polyisocyanurate (polyiso) |
| Facer | Non-asphaltic, fiber-reinforced organic felt facers |
| Item weight | 7 lb (per piece) |
| Coverage | 416 sq. ft. per unit |
| Applicable standards and approvals | ASTM C1289; CAN/ULC-S704; CCMC No. 12464-L; UL Certified for Canada; UL 1256; 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 |
| SKU / Material number | 45493 |
| Manufacturer number | AC2_024 |
| SKU product number | ATL18ISO4 |
| Unit of measure | PLT | SQ | PC |
Frequently Asked Questions (FAQ):
Q: What is the board size and thickness?
A: Each board measures 4 ft. x 4 ft. with a thickness of 1-4/5 in.
Q: What type of facer does it use?
A: It uses non-asphaltic, fiber-reinforced organic felt facers bonded to the polyiso core.
Q: Is this product approved for use in code-compliant roofing systems?
A: Yes. It lists approvals such as ASTM C1289, UL, FM 4450/4470, Miami-Dade County, and Florida Product Approval.
Q: How much does each board weigh?
A: Approximately 7 lb per piece.
Q: What is the coverage per unit?
A: 416 sq. ft. per unit, as specified for this SKU.
Sleek Thermal Backbone for Modern Roofscapes
This insulation board becomes the quiet hero of a refined roofline, delivering crisp performance behind the scenes. Its felt-faced surface reads clean and purposeful, a tailored layer that supports streamlined assemblies. Pair it with cool roof membranes for a sophisticated, high-contrast finish and elevated efficiency. Its a discreet essential that underpins a polished, luxury envelope.
Upgrade your roofs efficiency and reliability with Atlas ACFoam-IIadd the boards to your project plan today.
