Atlas ACFoam-II Polyiso Roof Insulation Board, 3.3 in. Thick, 4 ft. x 8 ft.3. 3" Polyiso Roof Insulation Board (4' x 8') Closed cell polyisocyanurate roof insulation board with fiber reinforced organic felt facers for superior long term thermal resistance. Ideal for commercial and residential low slope roofing systems, this 3. 3 inch thick board comes in a 4 by 8 foot sheet for efficient coverage. Key Features: High Thermal Performance: Polyiso core delivers strong LTTR for energy efficient roofs Durable Felt Facers: Non

3.3" Polyiso Roof Insulation Board (4' x 8')

Closed-cell polyisocyanurate roof insulation board with fiber-reinforced organic felt facers for superior long-term thermal resistance. Ideal for commercial and residential low-slope roofing systems, this 3.3-inch thick board comes in a 4-by-8-foot sheet for efficient coverage.

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Key Features:

• High Thermal Performance: Polyiso core delivers strong LTTR for energy-efficient roofs
• Durable Felt Facers: Non-asphaltic, fiber-reinforced organic facers enhance strength and adhesion
• Code Compliant: Meets ASTM C1289 and multiple UL, FM, and regional approvals including Miami-Dade and Florida Product Approval
• Versatile Application: Suitable for a variety of low-slope roofing assemblies as cover or insulation board
• Large Panel Size: 4' x 8' sheets simplify layout and speed installation

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Specifications Table:

Specification	Details
Product name	3.3" x 4' x 8' Polyiso Roof Insulation
Brand	Atlas
Series	ACFoam-II
Thickness	3.3"
Length	8' (2440 mm)
Width	4' (1220 mm)
Core material	Closed-cell polyisocyanurate (polyiso) foam
Facers	Non-asphaltic, fiber-reinforced organic felt facers
Unit of measure	SQ | PLT | PC
Approximate weight	33 lb
Applicable standards/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 manufacturer number	AC2_054
Seller product number	ATL33ISO
Coverage (listing note)	448 sq. ft. per unit (as listed)

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Frequently Asked Questions (FAQ):

Q: What are the board dimensions and thickness?
A: Each board is 4 feet by 8 feet and 3.3 inches thick.

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Q: What facers are used on this insulation?
A: It uses non-asphaltic, fiber-reinforced organic felt facers bonded to a polyiso foam core.

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Q: Is this product code approved?
A: Yes—complies with ASTM C1289 and carries UL, FM, Miami-Dade, and Florida Product Approvals, among others.

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Q: What is the typical use?
A: Designed for low-slope roofing systems to provide thermal insulation and a stable substrate within the roof assembly.

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Q: How much does one board weigh?
A: Approximately 33 lb per board.

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Sleek Thermal Armor for Modern Rooflines

This polyiso board brings a refined, architectural polish to roof assemblies while elevating performance. The fiber-felt facer offers a tailored, uniform surface that integrates beautifully beneath membranes. Layer it to sculpt a crisp, contemporary profile and harness impressive thermal efficiency. It’s a quiet luxury essential—clean, smart, and impeccably composed.

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Boost your roof’s efficiency and reliability—choose Atlas ACFoam-II 3.3" Polyiso today.