DensDeck® Roof Board

    An exceptional fire barrier, thermal barrier, and re-cover board used in various commercial roofing systems.

    DensDeck® Roof Board overview

    Why DensDeck® Roof Board?

    The patented DensDeck® design employs glass mat facings front and back that are embedded into a water-resistant gypsum core providing excellent fire resistance, moisture resistance, and wind uplift properties. 

    The unique construction of DensDeck® provides excellent flute spanning that stiffens and provides increased foot traffic resistance to the roof deck. Additionally, DensDeck® has been shown to withstand de-lamination, deterioration, warping, and jobsite damage more effectively than other roofing membrane substrates such as paper-faced gypsum board, fiber board, and perlite insulation.

    Benefits

    Benefits of DensDeck® Roof Board include:
    • Shown to withstand delamination, deterioration, warping, and jobsite damage more effectively than other roofing membrane substrates such as paper-faced gypsum board, fiber board, and perlite insulation.
    • An excellent fire barrier, DensDeck® Roof Boards feature a noncombustible core and inorganic surface that offer greater fire protection than other conventional commercial roofing products when applied over combustible roof decks and steel decks.
    • DensDeck® Roof Boards are FM tested and approved as the only 1/2" gypsum product to meet the calorimeter requirements for conventionally insulated decks.
    • Tested in accordance with ASTM E84, its surface burning characteristics are Flame Spread-0 and Smoke Developed-0. 5/8"
    • DensDeck® Roof Boards can replace any generic type X gypsum board in any roof assembly in the UL Fire Resistance Directory under the prefix.
    Size
    1/4" Dens Deck Roof Board
    R-Values .28 [Tested in accordance with ASTM C518]
    Spannings 1/4" - spans flute widths up to 2 5/8"
    Flexural Strengths, Parallel, lbs. min. ≥ 40 (178)
    Weights, nom. lbs. / M sq. ft. 1,100 lb. (498.95 kg)
    Thicknesses 1/4" (6.4 mm)
    Weights, nom. lbs. / sq. ft. 1.2 lb. (5.9 sq. ft.)
    Permeance Perms >50 (>2850) [Tested in accordance with ASTM E96 (dry cup method)]
    Flute Spanabilities 2.63" (67 mm)
    1/2" Dens Deck Roof Board
    R-Values .56 [Tested in accordance with ASTM C518]
    Spannings 1/2" - spans flute widths up to 5"
    Flexural Strengths, Parallel, lbs. min. ≥80 (356)
    Weights, nom. lbs. / M sq. ft. 1,950 lb. (884.51 kg)
    Thicknesses 1/2" (12.7 mm)
    Weights, nom. lbs. / sq. ft. 2.0 lb. (9.8 sq. ft.)
    Permeance Perms >35(>1995) [Tested in accordance with ASTM E96 (dry cup method)]
    Flute Spanabilities 5" (127 mm)
    5/8" Dens Deck Fireguard X
    R-Values .67 [Tested in accordance with ASTM C518]
    Spannings 5/8" - spans flutes up to 8" wide
    Flexural Strengths, Parallel, lbs. min. ≥100 (400)
    Weights, nom. lbs. / M sq. ft. 2,500 lb. (1133.98 kg)
    Thicknesses 5/8" (15.9 mm) Fireguard Type X
    Weights, nom. lbs. / sq. ft. 2.5 lb. (12.2 sq. ft.)
    Permeance Perms >32(>1824) [Tested in accordance with ASTM E96 (dry cup method)]
    Flute Spanabilities 8" (203 mm)

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