Atlas ACFoam-II 1-4/5 in. x 4 ft. x 4 ft. Polyiso Roof Insulation Board
Regular price $513.221-4/5" 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. It’s a discreet essential that underpins a polished, luxury envelope.
Upgrade your roof’s efficiency and reliability with Atlas ACFoam-II—add the boards to your project plan today.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
