All of our information is sourced from manufacturer data.

 Tapered ACFoam-III

Atlas Roofing Corporation

Tapered ACFoam-III

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Rigid Panels Rigid Panels

Polyiso (Polyisocyanurate) Polyiso (Polyisocyanurate)

Roof Insulation Roof Insulation

Design Options

Product Description

Closed-cell polyisocyanurate (polyiso) foam core integrally bonded to inorganic coated glass facers. Tapered ACFoam®-III is offered in a variety of slopes, to achieve positive drainage as well as long-term thermal resistance (LTTR). Available in 4ft x 4ft (1220mm x 1220mm) panels with 1/8” (3mm), 1/4” (6mm) and 1/2” (12mm) per foot slope.
Manufactured using CFC-, HCFC- and HFC-free foam blowing technology with zero ozone depletion potential (ODP) and virtually no (negligible) global warming potential (GWP).
Manufactured and tested for use in new and re-roofing applications.



Standard Sizes: 4' 0"


Standard Sizes: 4' 0", 8' 0"


Standard Sizes: 0-3/4", 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/4"

Manufacturer Design Notes

Tapered ACFoam®-III is used in built-up (BUR), modified bitumen, metal, ballasted single-ply, mechanically attached single-ply and adhered single-ply roofing systems. These roofing systems depend on proper installation for successful performance.

Performance Data

R-Value Per Inch

Measure of the thermal resistance of the product per inch of thickness, imperial units.

°F·ft^2·h / BTU / inch


NRC Value

The Noise Reduction Coefficient values of this product

Fire Resistance

Amount of time the product can withstand fire

Water Vapor Transmission

An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury

perm (imperial)


Smoke Development

As defined by the ASTM E84 testing standard

Units: (unitless)


Product Density

lbs / ft^3


Minimum Recycled

The minimum amount of the product's input materials that come from recycled sources



Flame Spread

As defined by the ASTM E84 testing standard

Units: (unitless)


Compressive Strength




UL Solutions

GREENGUARD Gold Certification

UL Solutions

Microbial Resistance

Atlas Roofing Corporation

802 Highway 19 N Ste 190 Meridian 39307

(601) 484-8900

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