CLASS B
Deck: Non-Combustible
Slope: 1:12 (BNC-01)
1.)
Vapor retarder (Optional)
Vapor retarder consisting of optional glass-faced gypsum or SECUROCK™ Brand Roof Board (min. ¼-inch thick) mechanically fastened, either spot adhered, fully adhered with hot roofing asphalt, semi-adhered with insulation listed adhesive ribbons or listed self-adhering sheets.
2.)
Insulation (Optional)
Polyisocyanurate, polyisocyanurate composite, polystyrene, polystyrene composite, glass fiber, perlite, rock wool, wood fiber, glass-faced gypsum or SECUROCK™ Brand Roof Board (min. ¼-inch thick), gypsum (min. ½-inch thick) or asphaltic cover boards (min. 1/8-inch thick), any thickness (except as noted) or combination, mechanically fastened, either spot adhered or fully adhered with hot roofing asphalt or semi-adhered with insulation adhesive ribbons.
Note: When EPS insulation is applied over a metal or combustible deck, a thermal barrier complying with section 2603.4.1.5 or applicable current section of the IBC is required.
3.)
Base Sheet
Omni Seal 410 mechanically attached with approved fasteners, 1 ply.
4.)
Mid Ply / Inter Ply
Omni Seal 420 Self-Adhered Base Sheet, 1 ply. be sure to offset seams.
5.)
Surfacing
Omni Seal 435 Self-Adhered Cap, minimum 1 ply.
Note: The component materials of each system must be applied in the order in which they are listed above.
For additional product information, visit Malarkey's website at http://www.malarkeyroofing.com/.
Evaluated to the following...
The roof covering systems in this section have been evaluated for external fire resistance Classification B as outlined by the following test methods:
-
ASTM-E108
- UL-790
- CAN/ULC S107
Each system listing identifies the deck substrate as either non-combustible or combustible. Systems evaluated for combustible decks will provide the same ratings when applied over non-combustible decks. Unless otherwise noted in individual listings, combustible decks shall be sheathed with a minimum 15/32" veneer plywood or minimum 7/16" non-veneer APA rated sheathing panel (oriented strand board panels, structural particleboard panels, composite panels or wafer-board panels) or 3/4" thick solid wood sheathing boards. The component materials of each system must be applied in the order in which they are listed. All components of the system must be listed for external fire exposure by an agency acceptable to the AHJ.
In all cases, manufacturer's instructions should be consulted for installation procedures and details not covered by these listings.
Listed Materials are identified by a label or marking bearing the wording, "Listed Roofing Component", a reference number or code and the WHI Certification Mark.
