Mechanically-Attached Single Ply / Steel Deck

Installation & Design Considerations

• Roof membrane is attached using mechanical fasteners specified by the membrane manufacturer.
• Dark color membranes must be separated from polystyrene roof insulation with a cover board, typically 1/2” wood fiber.
• White or light color, chemically compatible membranes can be mechanically attached directly over polystyrene roof insulation.
• Chemically incompatible membranes, such as PVC, require a slip sheet between the insulation and membrane.
• The need for, type and placement of vapor retarders should be determined by the building designer.
• Alternate deck materials; all FOAMULAR® roof insulations can be installed directly on concrete, gypsum, wood and Tectum decks.
• See Underwriters Laboratories or Factory Mutual listings for complete details.