Materials:AC Foam Supreme

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Materials:AC Foam Supreme

Notice to the Reader:

The roofing assembly / material information published in the RCABC Roofing Practices Manual and offered below does NOT represent a complete set of the manufacturer’s data or specifications. The preparation of a detailed specification is the responsibility of the design authority.

Manufacturer: Atlas Roofing Corporation
Accepted for RoofStar Guarantee Program
Date TBA
Product Summary
A polyisocyanurate core integrally laminated to a specially coated facer (ideal for self-adhered membranes).
All AC Foam product cores are state-of-the-art, closed-cell polyisocyanurate foam produced through the use of environmentally safe procedures. Polyisocyanurate, the most widely used and accepted foam insulation product in use today, provides superior fire performance characteristics and the ability to retain high R-Values. Designed for use in commercial roof applications. AC Foam products are available in a wide variety of facers, thicknesses and R-Values. Each AC Foam product is manufactured for exceptional strength, using dimensionally stable facers to add toughness to the boards and meet the high quality standards expected from Atlas.
AC Foam III•Polyisocyanurate core integrally laminated to a specially coated facer (ideal for self-adhered membranes).
AC Foam Supreme•Polyisocyanurate core integrally laminated to a tri-laminate foil facer.


Long Term Thermal Resistance (LTTR): RSI value = 1.06 / 25 mm (1") [R Value = 6.0 / 25mm (1")]
Foam Density 32 kg / cu.m (2.0 lb / cu ft.)
Compressive Strength 138 kpa (20 psi)
Uses •AC Foam III: Do not use with hot applied membranes, i.e. coal tar or asphalt
Standards (AC Foam III) Conforms to CAN / ULC S704-01 / CAN / CGSB 51.26-M86
FM-Class 1, I-60, I-90
UL C S-126
Standard Sizes 1.2 m x 1.2 m (48" x 48") for Asphalt or adhesive applied applications
1.2 m x 2.4 m (48" x 96") for Mechanically fastened applications


Atlas Manufactures AC Foam III in a tapered profile to attain positive drainage while maintaining the highest thermal efficiency in a tapered system. All tapered panels are 4' x 4' in size with standard slopes of 1/8" / ft. with a 1/2" / ft. slopes for crickets. Computerized designs complete with shop drawings are available to the architect design authority.

Click below for the Technical Data Sheet.
Technical Data Sheet

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