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TECHNOLOGY

In keeping with our tradition of market-driven innovation, Georgia-Pacific Gypsum has improved DensDeck® Prime Roof Boards with EONIC™ Technology, a patent protected enhancement. Incorporating EONIC™ Technology has doubled DensDeck Prime’s resistance to moisture making it the only roof board with manufacturing specifications that include 5% total water absorption resistance by weight and 1 gram surface water absorption performance on both sides of the board1. But that’s just the beginning of the story.

Total Water Absorption Test

In independent test2 results of ½” roof board, DensDeck® Prime Roof Board excelled:

  • Alternative coated glass mat gypsum absorbed 76% more water
  • Gypsum fiber absorbed 132% more water

Surface Water Absorption Test

In independent test2 results of ½” roof boards compared to DensDeck® Prime Roof Board:

  • Gypsum fiber absorbed 2.3x more water
  • Alternative coated glass mat gypsum absorbed 4.0x more water

Flexural Strength Before and After Soak Test

When exposed to water all roof boards lose strength, including flexural strength, but to varying degrees. In independent test3 results of 1/2″ roof boards:

  • DensDeck Prime tested 52% stronger than gypsum fiber and 57% stronger than alternative coated glass mat when dry
  • After standard, 2-hour soak, DensDeck Prime tested 267% stronger than gypsum fiber and 87% stronger than alternative coated glass mat
  • DensDeck Prime tested stronger after the 2-hour soak than both gypsum fiber and alternative coated glass mat tested before exposure to moisture

Vertical Pull Strength

In independent test4 results of ½” roof boards compared to DensDeck® Prime Roof Board:

  • Versus gypsum fiber: 74% stronger on the face, 14% on the back
  • Versus alternative coated glass mat: 2.5x stronger on the face, 7x stronger on the back
DensDeck-FreezeThawPanel-Chart

Freeze/Thaw Cycle Impact

To varying degrees, exposure to freeze/thaw cycles have a compromising effect on the vertical pull strength of all roof boards, producing cracks and ruptures that continue to grow with time and lead to delamination. In vertical pull strength testing1 of 1/2″ roof boards after exposure to 21 freeze/thaw cycles, DensDeck® Prime Roof Board demonstrated:

  • Versus gypsum fiber: 2x stronger on the face, 1.3x stronger on the back
  • Versus alternative coated glass mat: 12x stronger on the face, 25x stronger on the back

1 Third party testing conducted by PRI Construction Materials Technologies LLC in Tampa, FL, concluding in May 2018. Test conducted in accordance to a modified form of ASTM C67 as well as ASTM C209.