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home > Atlas ACFoam-II 1 in. x 4 ft. x 4 ft. Grade-III (25 psi) Polyiso Roof Insulation Board > Atlas ACFoam-II 1 in. x 4 ft. x 4 ft. Grade-III (25 psi) Polyiso Roof Insulation Board

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Atlas ACFoam-II 1 in. x 4 ft. x 4 ft. Grade-III (25 psi) Polyiso Roof Insulation Board1" Polyiso Roof Insulation Board, Grade III (25 psi) Closed cell polyisocyanurate roof insulation with fiber reinforced organic felt facers for durable thermal performance. This 1 inch, 4x4 board delivers long term thermal resistance (LTTR) and is designed for commercial and residential roofing systems. Key Features: Durable Construction: Closed cell polyiso core bonded to non asphaltic, fiber reinforced felt facers Grade III Compressive Strength: 25

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1" Polyiso Roof Insulation Board, Grade-III (25 psi)

Name: Atlas ACFoam-II 1 in. x 4 ft. x 4 ft. Grade-III (25 psi) Polyiso Roof Insulation Board
Brand: wellness-welten.net
SKU: 86523504941
Price: 513.22 USD
Availability: InStock
Rating: 4.4545 (2230 reviews)

Closed-cell polyisocyanurate roof insulation with fiber-reinforced organic felt facers for durable thermal performance. This 1-inch, 4x4 board delivers long-term thermal resistance (LTTR) and is designed for commercial and residential roofing systems.

Key Features:

Durable Construction: Closed-cell polyiso core bonded to non-asphaltic, fiber-reinforced felt facers
Grade-III Compressive Strength: 25 psi rating for robust roof assemblies
Consistent Thermal Performance: Offers long-term thermal resistance (LTTR) across thickness options
Standard Board Size: 1 in. thickness, 4 ft. x 4 ft. dimensions for easy layout and handling
Industry Approvals: Meets ASTM C1289 and multiple UL, FM, IBC/NBC, Miami-Dade, and Florida standards

Specifications Table:

Specification	Details
Thickness	1" (25.4 mm)
Length	4' (1220 mm)
Width	4' (1220 mm)
Material	Closed-cell polyisocyanurate (polyiso) foam core
Facers	Non-asphaltic, fiber-reinforced organic felt facers
Compressive Strength	Grade-III, 25 psi
Certifications/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; IBC Chapter 26 & NBC; Miami-Dade County Approved; Florida Product Approved; UL Greenguard Gold Certified; RCI Approved; AIA Approved; USGBC Member; NRCA
Unit Area	768 sq. ft. per unit
Style	Polyiso
Manufacturer Number	AC2_25PSI_00
Product Number	ATL1ISO4G3

Frequently Asked Questions (FAQ):

Q: Can this board be used over metal or concrete decks?
A: Yes, it is approved under multiple UL and FM standards for a variety of roof deck types; follow the specific assembly requirements in the product data sheet.

Q: What is the compressive strength rating?
A: Grade-III boards are rated at 25 psi.

Q: Does it contribute to indoor air quality certifications?
A: Yes, it is UL Greenguard Gold Certified.

Q: How is it fastened?
A: Use the manufacturer’s Fastening Pattern Guide for appropriate mechanical attachment or adhesive application per roof system design.

Q: What are the board dimensions?
A: 1 inch thick, 4 feet by 4 feet.

Sleek Thermal Armor for Modern Roofscapes

This streamlined insulation board brings quiet sophistication to the roofline while delivering steadfast thermal performance. Its fiber-reinforced facers create a refined, uniform surface that supports clean, contemporary assemblies. Pair with a high-contrast membrane and precision metal edging for a crisp architectural profile. A smart essential for luxurious, energy-conscious envelopes.

Upgrade your roof assembly with Atlas ACFoam-II Grade-III polyiso for dependable strength and long-term thermal efficiency.

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