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ACFoam®-IV: The New Standard in Roof Insulation
Atlas Roofing Corporation has recorded another first. Thanks to Atlas’ innovative facer technology, Atlas has developed the first high performance polyiso roof insulation product capable of never-before-seen wind uplift ratings for selected roof membranes adhered directly to polyiso. Until now, high wind ratings over steel decks have been possible only when 7/16 in. OSB or 1/2 in. moisture resistant gypsum boards were placed over the polyiso before fastening the insulation. Thanks to this patent-pending facer, Atlas is pleased to announce the next generation of cutting edge roof insulation: ACFoam-IV®.
Dimensional Stability
As the only polyiso roof insulation manufacturer that manufacturers its own polyiso facers, it is not surprising that our vertical integration has produced technology that leads the field. As a result, Atlas® has now developed the most dimensionally stable roof insulation board in the industry. Unlike industry standard polyiso that can cup, especially when exposed to moisture and subsequent radiant heat, ACFoam-IV® has not cupped, warped, or shrunk under laboratory or normal installation conditions. As a result, the number of fasteners required to attach ACFoam-IV® in a mechanically attached membrane roof system has been reduced from 5 to 4.
Facer Adhesion and Flatness
Atlas’s new glass mat coating technology has improved facer adhesion to the foam core beyond anything ever seen in the industry. To date, facer peel tests by a third-party testing laboratory have shown in some cases a 200% improvement over typical coated glass or glass-reinforced felt facer adhesion. In addition, after testing in the widely recognized Rolling Load Emulator (RLE), a rigorous test of facer adhesion, ACFoam-IV produced a 500% improvement in typical test results. After 5 times more rolling repetitions across the surface of ACFoam-IV than typically performed in the QC test, the facer remained fully adhered to the foam core. The test was discontinued without failure. In addition, the more rigid, flatter surface of ACFoam-IV provides an ideal surface for fully adhered single-ply membranes, especially when smoothness of the finished roof
is an aesthetic concern.
Polyiso Board Strength
The strength of the board and its resistance to breakage, a key element in wind uplift testing, has significantly improved. Fastener pull-through tests performed by fastener manufacturers and FM Approvals show as much as 200% improvement in performance. This feature, coupled with improved facer adhesion and facer cohesive strength, account for the remarkable performance in wind uplift tests.
High Wind Ratings Without Cover Boards
Thanks to ACFoam-IV, cover boards, the otherwise necessary and expensive addition to roof systems, are no longer needed in corners and perimeter areas to meet FM Approval’s enhanced requirements for adhered roof systems in designated Hurricane Zones. As a result, the contractor does not have to adjust insulation height and specified LTTR-values to accommodate the cover boards or haul heavy, expensive cover boards across the roof, all contributing to huge savings on many projects. So far, ACFoam-IV has achieved a maximum FM wind uplift rating of 1-345. With fewer fasteners, it can also be used up to 1-240, more than high enough to satisfy the FM 1-90 specified corner requirement of 1-225. A second round of tests established ratings of 1-120 and 1-150. The table below shows the fastener rates needed in selected membrane roof systems to satisfy FM ratings of 1-90 through 1-135. Atlas Roofing Corporation, the recognized leader in polyiso roof insulation product development, has enjoyed this reputation, among other reasons, for its development of polyiso foam free of CFCs and HCFCs, earning it the EPA’s prestigious Stratospheric Ozone Protection award. In addition, Atlas pioneered the development and manufacture of a facer containing 100% recycled materials. Now, Atlas leads the way again, this time through its facer technology and the foresight of the Sales and Marketing group, introducing a breakthrough product called ACFoam-IV, which reduces thermal loss through fasteners/plates by as much as 25%, while providing extraordinary wind uplift ratings, improved flatness, and the standard high thermal performance already expected from Atlas’s ACFoam products.
Product Description
- A closed-cell polyiso foam core integrally laminated to heavy, durable and dimensionally stable inorganic coated-glass facers.
- Offered in a variety of thicknesses, providing long-term thermal resistance (LTTR) values from 6.0 to 25.0.
- Available in 4' x 4' (1220mm x 1220mm) and 4' x 8' (1220mm x 2440mm) panels.
- Provides high wind uplift ratings in fully adhered systems ranging from FM 1-90 to FM 1-345.
- UL Class A over combustible decks.
- Typically specified for BUR, modified bitumen, and single-ply membrane systems.
- CFC-, HCFC-, and HFC-free foam blowing technology with zero ozone depletion potential (ODP) and zero (negligible) global warming potential (GWP).
- Polyiso is the highest R-Value per inch insulation in the industry. Excellent R-Values reduce energy demands while maintaining compatibility with all types of roofing membranes and fire assemblies. See ASHRAE 90.1 Standards for Model Energy Code.
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As a leader in the building products industry, Atlas Roofing Corporation is committed not only to compliance with the law relating to the environment, but also to the integration of sound environmental practices in its business decisions.
GEMINI™ Tapered Edge Strips are the only polyiso insulation component with a Zero Edge Solution. Gemini TES provides a smooth transition from tapered edge to roof surface in a dimensionally stable insulation panel for use in Single-Ply, Mod-Bit, and BUR systems. The best thing about Gemini TES is that they provide a stronger, more durable edge material than perlite or fiberboard.
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