1" 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 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 manufacturers 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.
Warranty
