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DensDeck® Prime Roof Board

DensDeck Prime is a trusted and durable roof substrate that can be used in virtually any commercial roofing system. DensDeck Prime can mitigate the risk from fire, foot traffic, and hail damage, helping to add lifespan to the roofing system.

DensDeck panels’ superior dimensional stability over competitive gypsum fiber boards is due to their low coefficient of thermal and hygrometric expansion. DensDeck® panels used as cover boards do not need to be gapped. Watch Video

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Third-party testing during 20141 revealed that:

DensDeck® Roof Boards are more resilient during simulated hail events, and less likely to allow membrane damage;

compared to identically-tested roofing assemblies featuring high density polyisocyanurate (HD ISO) boards.
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The enhanced boards also demonstrate superior compressive strength to support installation equipment and post-construction foot traffic.


  • Thermal Barrier
  • Ideal Cover Board
  • Single-Ply Adhered
  • Modified Bitumen
  • Built Up Roofing (BUR)
  • Spray Foam
  • Solar, Vegetative, Cool

Technical Guide



Safety & Sustainability

Project Profiles

Tech Talk


1 National Oceanic and Atmospheric Administration,

For recommendations and limitations of use for DensDeck Roof Boards, download the technical brochure. Georgia-Pacific Gypsum does not warrant or provide specifications for any specific roofing assembly or any component other than DensDeck Roof Boards. Consult with the appropriate system manufacturer or design authority for system specifications and instructions.

The USGBC logo and LEED are a trademarks of the U.S. Green Building Council and are used with permission.

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