• Provides superior fire protection
  • Resists fire and hail damage
  • Holds up well under normal construction and maintenance foot traffic while stiffening and stabilizing roof decks
  • Easy to install in all types of roof systems
  • Ideal product for direct membrane application
  • Tested within roofing systems for sound isolation
Building on our 30-year history of market-driven innovation

DensDeck® Prime Roof Boards have been enhanced with EONIC™ Technology, a patented system that delivers advanced moisture performance and mat-to-core bond strength.

With this advancement, DensDeck® Prime Roof Boards are now the only roof board with manufacturing specifications that include 5%1 total water absorption by weight and 1 gram2 surface water absorption performance on both sides of the board.3 Also improved is the boards critical mat-to-core bond strength which in independent testing4 averaged 23% stronger on the face and 192% stronger on the back when compared to DensDeck® Prime Roof Boards before the enhancement.

DensDeck® Prime Roof Boards continues to provide a broader compatibility and higher performance with roofing adhesives. Face mat allows adhesives to be applied more uniformly and consistently and results in a stronger bond with the membrane. For fully adhered and self-adhered “peel & stick” roofing systems, as well as hot mopped, cold mastic and torch-applied modified bitumen roofs, DensDeck® Prime provides a stronger, more economical installation by reducing the amount of mastic or adhesive, and potentially eliminating the field primer. Consult with membrane manufacturer for actual priming requirements.

1Maximum value.  2Nominal value.  3Based on published manufacturing specifications as of December 1, 2017

Fire Resistance

Increased fire resistance beyond regular gypsum board

HAIL RESISTANCE

Enhanced resistance to hail

WIND RESISTANCE

Improved wind uplift performance

SPECIAL APPLICATIONS

Specialty application as both cover boards and thermal barriers

SPECS

PHYSICAL PROPERTIES: 1/4" (6.4 MM) DENSDECK® PRIME ROOF BOARD
Thickness

Nominal: 1/4″ (6.4 mm) ± 1/16″ (1.6 mm)

Width

Standard: 4′ (1219 mm) ± 1/8″ (3 mm)

Length

Standard: 4′ (1219 mm) AND 8′ (2438 mm) ± 1/4″ (6.4 mm)

Weight

lbs/sq. ft. nominal (kg/m²): 1.2 (5.9)1

Flexural Strength

Parallel, lbf. Min. (N) ≥40 (178)2

R Value

°F•ft2•hr/BTU (m2•K/W): .283

1Represents approximate weight for design and shipping purposes. Actual weight may vary based on manufacturing location and other factors. 2Tested in accordance with ASTM C473, method B. 3Tested in accordance with ASTM C518 (heat flow meter).

PHYSICAL PROPERTIES: 1/2" (12.7 MM) DENSDECK® PRIME ROOF BOARD
Thickness

nominal: 1/2″ (12.7 mm) ± 1/32″ (0.8 mm)

Width

standard: 4′ (1219 mm) ± 1/8″ (3 mm)

Length

standard: 4′ (1219 mm) AND 8′ (2438 MM) ± 1/4″ (6.4 mm)

Weight

lbs/sq. ft. nominal (kg/m²): 2.0 (9.8)1

Flexural Strength

parallel, lbf. Min. (N) ≥80 (356)2

R Value

°F•ft2•hr/BTU (m2•K/W): 0.563

1Represents approximate weight for design and shipping purposes. Actual weight may vary based on manufacturing location and other factors. 2Tested in accordance with ASTM C473, method B. 3Tested in accordance with ASTM C518 (heat flow meter).

PHYSICAL PROPERTIES: 5/8" (12.7 MM) DENSDECK® PRIME ROOF BOARD
Thickness

nominal: 5/8″ (15.9 mm) ± 1/32″ (0.8 mm)

Width

standard: 4′ (1219 mm) ± 1/8″ (3 mm)

Length

standard: 4′ (1219 mm) AND 8′ (2438 MM) ± 1/4″ (6.4 mm)

Weight

lbs/sq. ft. nominal (kg/m²): 2.5 (12.2)1

Flexural Strength

parallel, lbf. Min. (N) ≥ 100 (444)2

R Value

°F•ft2•hr/BTU (m2•K/W): 0.673

1Represents approximate weight for design and shipping purposes. Actual weight may vary based on manufacturing location and other factors. 2Tested in accordance with ASTM C473, method B. 3Tested in accordance with ASTM C518 (heat flow meter).

Certifications: 1/4", 1/2", and 5/8" DensDeck® Roof Board
UL Listed Fire RatedCE Mark

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