Atlas ACFoam-II tapered polyiso roof insulation boards are engineered to promote positive drainage on low-slope roofing systems. With a durable fiber-reinforced felt facer on both sides and a tapered polyiso foam core, these boards deliver excellent thermal performance while helping prevent ponding water. A smart, code-friendly choice for energy-efficient commercial roofs where drainage and insulation matter.

Key Features & Design

• Two-sided fiber-reinforced facers: provide added strength and stability for demanding roof assemblies.
• Tapered polyiso core: optimized thickness to support effective drainage and high thermal resistance.
• 4 ft x 4 ft panels: lightweight, easy to handle and install on flat and low-slope roofs.
• High R-value per inch: superior insulation performance to help meet energy codes.
• Lightweight & easy to cut: simplifies field cuts and reduces installation time.
• Compatibility: suitable for a variety of commercial roofing systems and slope applications.
• Manufactured in the USA: with zero ozone-depleting components and LEED credit eligibility.

Specifications & Compliance

• Core & facers: tapered polyiso foam core with a durable fiber-reinforced felt facer on both sides.
• Size: 4 ft x 4 ft panels.
• Slope taper range & R-value:
  • 1/8 in/ft, 0.5"–1" thickness — R-4.3 — 64 sheets — 1,024 sq ft per pallet
  • 1/8 in/ft, 1"–1.5" — R-7.1 — 38 sheets — 608 sq ft per pallet
  • 1/8 in/ft, 1.5"–2" — R-10 — 26 sheets — 416 sq ft per pallet
  • 1/8 in/ft, 2"–2.5" — R-12.9 — 20 sheets — 320 sq ft per pallet
  • 1/4 in/ft, 0.5"–1.5" — R-5.7 — 48 sheets — 768 sq ft per pallet
  • 1/4 in/ft, 1.5"–2.5" — R-11.4 — 24 sheets — 384 sq ft per pallet
  • 1/2 in/ft, 0.5"–2.5" — R-8.6 — 32 sheets — 512 sq ft per pallet
• Certifications & compliance: Complies with ASTM C1289 (Type II, Class 1); UL, FM, Miami-Dade, and ICC-ES approved. Zero ozone-depleting components. Eligible for LEED® credit contribution.