Flex TPO Mechanically Attached Systems Fastening - Manual (Page 2)

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5. Cementitious Wood Fiber minimum pullout resistance of 300 pounds per fastener.
6. Gypsum minimum pullout resistance of 300 pounds per fastener.
Approved Flex Fastener and Plate is installed in the membrane seam and spaced XHD Fasteners and
Plates 6” on center or SXHD Fasteners and Plates 12” on center depending on the project design criteria.
Contact Flex Technical Services for attachment information in areas where the average wind speed is
greater than 55 mph.
Insulation Attachment:
Flex requires that approved insulation or cover boards be pre-secured to the deck prior to installing the
Flex TPO Plus roof membrane.
1. Polyisocyanurate Roof Insulation Board: Minimum of 1 ½” thick: Minimum of 5 fasteners and 3”
plates per 4’ x 8’ board.
2. DensDeck Roof Cover Board: Minimum of 5 fasteners and 3” plates per 4’x 8’ board.
3. Securock Roof Cover Board: Minimum of 5 fasteners and 3” plates per 4’x 8’ board.
3. Polyisocyanurate Roof Insulation Board less than 1 ½” thick or Extruded Polystyrene Roof
Insulation Board: Minimum of 6 fasteners and 3” plates per 4’x 8’ board.