Atlas ACFoam-II Polyiso Roof Insulation Board, 3 in. x 4 ft. x 8 ft.3 in. Polyiso Roof Insulation Board (4x8) Closed cell polyisocyanurate roof insulation with fiber reinforced organic felt facers for superior thermal performance. The 3 inch ACFoam II board delivers high LTTR values and is sized 4 ft. x 8 ft. for efficient coverage on commercial and residential flat roofs. Key Features: High Thermal Efficiency: Closed cell polyiso core provides strong long term thermal resistance (LTTR). Durable Facers: Non asphaltic,

3 in. Polyiso Roof Insulation Board (4x8)

Closed-cell polyisocyanurate roof insulation with fiber-reinforced organic felt facers for superior thermal performance. The 3-inch ACFoam-II board delivers high LTTR values and is sized 4 ft. x 8 ft. for efficient coverage on commercial and residential flat roofs.

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Key Features:

• High Thermal Efficiency: Closed-cell polyiso core provides strong long-term thermal resistance (LTTR).
• Durable Facers: Non-asphaltic, fiber-reinforced organic felt facers add strength and stability.
• Code Compliant: Meets ASTM C1289 and multiple UL/FM standards; Miami-Dade and Florida approvals.
• Versatile Application: Suitable for a range of low-slope roofing systems and assemblies.
• Large Coverage: 4 ft. x 8 ft. boards streamline installation across wide roof areas.

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Specifications Table:

Specification	Details
Product Name	3" x 4' x 8' Polyiso Roof Insulation
Brand	Atlas
Model/Series	ACFoam-II
Thickness	3" (76.2 mm)
Length	8' (2440 mm)
Width	4' (1220 mm)
Core Material	Closed-cell polyisocyanurate (polyiso) foam
Facers	Non-asphaltic, fiber-reinforced organic felt facers
Coverage	512 Sq. Ft. per Unit
Item Weight	19.2 lb
Standards/Approvals	ASTM C1289; CAN/ULC-S704; CCMC No. 12464-L; UL 1256; UL 790 (ASTM E108); UL 263 (ASTM E119); UL 1897; FM 4450/4470; IBC Chapter 26 & NBC; Miami-Dade County Approved; Florida Product Approved; UL Greenguard Gold Certified; RCI Approved; AIA Approved; USGBC Member; NRCA
Manufacturer Number	AC2_050
Product Number	ATL3ISO
Unit of Measure	SQ | SHT | PC
Description	ACFoam-II offered in various thicknesses delivering long-term thermal resistance (LTTR).

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Frequently Asked Questions (FAQ):

Q: What are the board dimensions and thickness?
A: Each board measures 4 ft. x 8 ft. with a 3 in. thickness.

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Q: What is the core material?
A: Closed-cell polyisocyanurate (polyiso) foam.

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Q: What type of facers are used?
A: Non-asphaltic, fiber-reinforced organic felt facers.

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Q: Which standards and approvals does it meet?
A: ASTM C1289; CAN/ULC-S704; multiple UL standards (1256, 790, 263, 1897); FM 4450/4470; Miami-Dade and Florida Product Approvals; UL Greenguard Gold, among others.

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Q: How much area does a unit cover?
A: 512 sq. ft. per unit.

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Sculpted Warmth for Modern Rooflines

This polyiso board brings a refined practicality to the building envelope, wrapping your structure in quiet, confident performance. The felt-faced surface feels tailored, a sleek layer that elevates the craft of a low-slope roof. Pair it with a clean, monochrome membrane and crisp metal edges for an architectural, gallery-like finish. It’s the discreet luxury that keeps interiors serene and energy-savvy.

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Insulate smarter—choose Atlas ACFoam‑II for high LTTR performance and code-ready reliability on your next roofing project.

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