UL CLASS A APPROVALS: COMBUSTIBLE WOOD DECK
ACFoam®-HD CoverBoard-FR was developed with the same inorganic coated glass facers as ACFoam®-III. ACFoam-HD CoverBoard-FR facers are bonded to a high-density polyiso foam core that offers increased dimensional stability and helps meet a UL Class A Rating in combustible roof deck assemblies. View or Download Class A Assemblies PDF.
ATLAS COMBUSTIBLE WOOD DECK UL CLASS A ASSEMBLIES:
Max. Slope: ½”
Incline is limited to the current rating of the UL Classified TPO, PVC or EPDM membranes with ACFoam-II or ACFoam-III insulations but cannot exceed ½” slope.
- Combustible deck
- Optional–ACFoam-II or ACFoam-III, any thickness, mechanically fastened
- Minimum 0.625ʺ ACFoam-HD CoverBoard-FR, mechanically fastened with butt joints in the insulation staggered 6ʺ from butt joints in the plywood deck
- Any UL Classified TPO, PVC, EPDM membrane (any thickness), that is currently classified to be used with ACFoam-II or ACFoam-III insulation, mechanically fastened or fully adhered
Max. Slope: ¾ʺ
Membrane must be currently classified for use over the insulation used. Actual incline is determined by the maximum existing membrane/insulation classification incline.
- Combustible deck
- Two layers FR-10
- Optional–Any UL Classified insulation, any thickness (Except EPS and wood fiberboard)
- Any UL Classified PVC, CPE, CSM, CSPE, EPDM, NBP, PIB, TPO, EIP or TRE membrane
Max. Slope: ½ʺ
The maximum incline shall be in accordance with the classification established for the membrane/insulation roofing assembly, however the incline cannot exceed ½ʺ.
- Combustible deck
- A minimum 3ʺ layer of ACFoam-III or ACFoam-III NH, or a minimum two layers of 1.5ʺ of ACFoam-III or ACFoam-III NH
- Any UL Classified roofing membrane used in any UL Class A roofing assembly to achieve a Class A Fire Classification
Max. Slope: ½ʺ
The maximum incline shall be in accordance with the classification established for the membrane/insulation roofing assembly, however the incline cannot exceed ½ʺ.
- Combustible deck
- FR-10
- 1.5ʺ of ACFoam-III or ACFoam-III NH
- Reference UL Product iQ™ for approved membranes
Max. Slope: No Limitation
- Combustible deck
- Minimum 0.625ʺ ACFoam®-HD CoverBoard-FR, mechanically fastened with butt joints in the insulation staggered 6ʺ from butt joints in the plywood deck
- Base Sheet (Optional) – Type 15 or 30 or any UL Classified self-adhering underlayment
- UL Classified coated steel roofing panels (26 GA minimum)
For a complete list of UL Classifications, please refer to UL Product iQ™; Atlas Roofing Corporation UL Category Code TGFU, File Number R13089, or contact the Atlas Roofing Corporation Technical Department.
