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Atlas ACFoam-II 4 ft. x 4 ft. Tapered Polyiso Roof Insulation Panel, D Taper (2-1/2 in. to 3 in.)
Regular price $40.48Orders start at $399 — combine any items to reach the minimum. Learn more
Atlas ACFoam-II 4 ft. x 4 ft. Tapered Polyiso Roof Insulation Panel, D Taper (2-1/2 in. to 3 in.)
This Atlas ACFoam-II tapered polyisocyanurate roof insulation panel measures 4 ft. x 4 ft. and tapers from 2-1/2 in. to 3 in. (D taper). A closed-cell polyiso foam core is integrally bonded to non-asphaltic, fiber-reinforced organic felt facers to create positive drainage and long-term thermal resistance. Sold per panel, 256 sq ft coverage per unit of 16 panels.
Key Features:
- Positive drainage: Tapered design achieves positive drainage on low-slope roofs.
- Closed-cell foam core: Closed-cell polyisocyanurate foam core is integrally bonded to non-asphaltic, fiber-reinforced organic felt facers.
- Long-term R-value: Tapered ACFoam-II delivers long-term thermal resistance (LTTR).
- Eco-friendly foam: Manufactured using CFC-free, HCFC-free, and HFC-free blowing technology with zero ozone depletion potential and negligible global warming potential.
- Recycled content: Contains between 52.9% and 27.6% recycled materials.
- Broad approvals: FM 4450/4470 approved, Miami-Dade County approved, Florida Product approved, and Greenguard certified.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Atlas |
| Manufacturer model | TP2_012 |
| Sell unit | 1 panel, 4 ft. x 4 ft. (coverage listed as 256 sq ft per unit) |
| Product line | ACFoam-II ISO Tapered (GRF facers) |
| Profile / style | Tapered polyiso roof insulation, D taper |
| Dimensions | 4 ft. x 4 ft. panel, 2-1/2 in. to 3 in. taper |
| Material | Polyisocyanurate (polyiso) foam with fiber-reinforced organic felt facers |
| Color | Brown |
| Thickness | Tapers 2-1/2 in. to 3 in. |
| Fire rating | UL 790 (ASTM E108), UL 263 (ASTM E119), UL 1256 classification |
| Approvals | ASTM C1289; CAN/ULC-S704; FM 4450/4470; Miami-Dade County; Florida Product Approved; Greenguard Certified |
| Weight | 8.83 lb |
| Intended use | Low-slope commercial and residential roof insulation for positive drainage |
Coverage & How Much You Need:
Each 4 ft. x 4 ft. panel covers 16 sq ft; the QXO coverage figure of 256 sq ft corresponds to a 16-panel unit. Plan the tapered layout with your roofing contractor, as slope direction and fill panels depend on the roof plan.
Fit and Compatibility:
Designed for use under low-slope membrane roofing systems per Atlas installation guidelines; consult the membrane manufacturer, local building codes, and contract documents for compatibility and fastening requirements.
Frequently Asked Questions (FAQ):
Q: What size is this panel?
A: Each panel is 4 ft. x 4 ft. and tapers from 2-1/2 in. to 3 in. (D taper).
Q: How much does one unit cover?
A: The listing shows 256 sq ft of coverage, which corresponds to a unit of sixteen 16 sq ft panels.
Q: What slope does a D taper provide?
A: Atlas offers tapered ACFoam-II in 1/8 in., 1/4 in., and 1/2 in. per foot slopes; confirm the slope for this specific D taper with your design documents.
Q: What facers does it have?
A: Non-asphaltic, fiber-reinforced organic felt facers (GRF) integrally bonded to the closed-cell polyiso core.
Q: Can it be used on any roof?
A: It is intended for low-slope roof insulation; Atlas recommends consulting local building codes, contract documents, a professional engineer, FM Global, Miami-Dade County, and the membrane manufacturer before installation.
Q: Is it certified?
A: It meets ASTM C1289 and holds FM 4450/4470, Miami-Dade County, Florida Product, and Greenguard certifications.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Tapered polyiso is the standard way to build positive drainage into a low-slope roof without re-pitching the deck. Order the full taper layout as a kit so panels and fill pieces arrive cut to the same plan, and keep the D taper (2-1/2 to 3 in.) consistent with the specified slope. Always confirm the facing type (GRF here) matches the membrane manufacturer's requirements, and follow Atlas installation guidelines with appropriate fasteners or adhesives per the system design.
Consult local building codes, contract documents, and the membrane manufacturer's installation guidelines before installing tapered roof insulation.
Build positive drainage into your low-slope roof with Atlas ACFoam-II tapered polyiso insulation panels.
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