Atlas ACFoam Tapered Polyiso Roof Insulation Board (1/8 in/ft Slope)
Tapered ACFoam polyiso insulation board
Atlas tapered ACFoam rigid insulation is designed for low-slope roofing to help create positive drainage while adding thermal performance. The tapered polyiso core supports energy-efficient roof assemblies and helps reduce ponding water risk.
Key Features:
- Positive Drainage Design: Tapered profile helps move water to drains/scuppers on low-slope roofs
- High-Performance Polyiso Core: Provides strong thermal efficiency per inch for energy-conscious roof assemblies
- Commercial Roofing Compatibility: Intended for use across a range of low-slope commercial roofing systems
- Code & Certification Ready: Listed compliance/approvals to support specification on regulated projects
- Jobsite Friendly Handling: Lightweight and easy to cut and fit during installation
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Atlas |
| Product name/description | Atlas EN 1/8" A Tapered ACFoam |
| Category | Insulation & Weatherproofing |
| Sub-category | Tapered Rigid Insulation Boards |
| Unit of measure | SH - Sheet |
| Slope | 1/8 in/ft |
| Taper type | A taper |
| Core material | Polyisocyanurate foam (Polyiso) |
| Panel size | 4 ft x 4 ft |
| Product type | Tapered polyiso roof insulation board |
| Applicable standard | ASTM C1289 (Type II, Class 1) |
| Approvals | UL, FM, Miami-Dade, ICC-ES (listed) |
| Environmental | Zero ozone-depleting components (listed) |
| Sustainability | Eligible for LEED credit contribution (listed) |
Frequently Asked Questions (FAQ):
Q: What does “1/8 in/ft taper” mean?
A: It indicates the board thickness increases by 1/8 inch for every 12 inches of run to help create roof slope for drainage.
Q: Where is tapered polyiso insulation typically used?
A: It’s commonly used on low-slope commercial roofing to improve drainage while adding continuous insulation above the deck.
Q: What size are the boards?
A: This product line is commonly provided in 4 ft x 4 ft panels; confirm the exact size needed for your takeoff and layout.
Q: Is this product compliant with common insulation standards?
A: It’s listed as complying with ASTM C1289 (Type II, Class 1) and noted as UL/FM/Miami-Dade/ICC-ES approved in the provided data.
A sleek, architectural slope—performance that disappears into the design
There’s a quiet sophistication in a roof system that performs beautifully without announcing itself. This tapered polyiso board brings sculpted precision to the plane above—helping guide water away while supporting a clean, disciplined envelope. Use it to refine low-slope rooflines where technical rigor is the real luxury. It’s the kind of behind-the-scenes essential that elevates the entire build.
Choose Atlas tapered ACFoam insulation to build in drainage and thermal efficiency where low-slope roofs need it most.