The FORTIFIED Factor

Tape Types for Sealed Roof Deck Systems


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In this episode of The FORTIFIED Factor, AI Experts (informed by Knockout Inspections) break down one of the most important—but often overlooked—components of a FORTIFIED™ Roof system: the tape used to seal roof deck seams.

Not all tapes are created equal. Choosing the right material can mean the difference between a home that withstands wind-driven rain—and one that suffers costly water intrusion.

Drawing from official FORTIFIED engineering guidance and IBHS resources, this episode covers:

  •  The two approved tape standards for sealed roof decks: 
    •  ASTM D1970 (modified bitumen) 
    •  AAMA 711-13 Level 3 (flexible flashing tapes) 
  •  Why proper adhesion (no wrinkles, no voids) is critical to performance 
  •  How OSB roof decking can impact tape adhesion—and when primers are required
  •  The three main tape types homeowners and contractors should understand: 
    •  Modified Bitumen 
    •  Butyl 
    •  Acrylic 
  •  Key differences in temperature performance, flexibility, and durability
  •  Installation best practices to ensure your sealed roof deck actually performs during a storm 

You’ll also learn why pressure-sensitive adhesives depend on proper installation conditions—and how small mistakes can compromise your entire roofing system.

If you’re considering a roof replacement, FORTIFIED upgrade, or just want to better protect your home, this episode gives you the clarity you need to make informed decisions.

📞 Have questions about your roof or FORTIFIED standards? Contact Knockout Inspections at 855-GO-FOR-KO (855-463-6756) or visit fortifiedhome.com to learn more.

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The FORTIFIED FactorBy Knockout Inspections