DensDeck® Roof Board
- Commercial roofing board used as a cover board, thermal barrier, or substrate board
- Noncombustible gypsum panel with zero flame spread and zero smoke developed when tested in accordance with ASTM E84
- Provides enhanced Wind uplift resistance
- Improves hail resistance of the roof assembly and is FM classified for severe hail (SH)
- Resists punctures that occur from things like maintenance foot traffic or dropped tools
- Typically used for mechanically fastened assemblies
- When used as a cover board, DensDeck provides increased resistance to puncture damage of the roof membrane.
Highly durable and versatile protection for commercial low slope roofs
DensDeck® Roof Board is designed to address persistent challenges inherent in commercial roofing assemblies, including fire resistance, durability and dimensional stability when installed in a properly designed roof assembly. With a non-combustible gypsum core, it has 0 flame spread and 0 smoke developed when tested in accordance with ASTM E84 and CAN/ULC-S102. It is also UL classified for resistance to both external and internal fire sources per ANSI/UL 790 and ANSI/UL1256. Being a strong rigid board, it can enhance a roof’s ability to resist wind uplift forces that can cause fastener pull-through. DensDeck® resists impact from repeated events like maintenance foot traffic, dropped tools, and flying debris. It also stands strong against hail strikes and is FM classified for severe hail (SH). DensDeck can serve as a thermal barrier, installed below the insulation to protect against internal fires. In most assemblies it will be used as an insulation overlayment (membrane underlayment) or cover board. In other assemblies it will serve both of these roles in the same system.
Product Specifications
PERFORMANCE ATTRIBUTES
| R Value | °F•ft2•hr/BTU (m2•K/W): .28 |
| Humidified Deflection | ≤1/8″ (3 mm) |
| ASTM Type | ASTM C473; ASTM E661; ASTM E96; ASTM C518; ASTM C1177; ASTM C473 |
| Flame Spread & Smoke Development | (ASTM E84): 0/0 |
| Fire Rating | Type X |
| Mold Resistance | No (10/10) |
| Flexural Strength, parallel, lbf. min. (N) | ≥40 (178) |
| Flute Spanability1 | 2-5/8” (67 mm) |
| Permeance, Perms (ng/Pa•S•m2 ) | >50 (>2850) |
| Linear Variation with Change in Temp., in/in/°F (mm/mm/°C) | 8.5 x 10-6 (15.3 x 106) |
| Linear Variation with Change in Moisture | 6.25 x 106 |
| Water Absorption, % max2 | <10 |
| Compressive Strength, psi nominal | 900 |
| Surface Water Absorption, grams, nominal | <2.5 |
| Bending Radius | 5’ (1524 mm) |
PHYSICAL PROPERTIES
| Length | standard: 8’ (2438 mm) ± 1/4” (6.4 mm) |
| Width | standard: 4’ (1219 mm) ± 1/8” (3 mm) |
| Thickness | nominal: 1/4” (6.4 mm) ± 1/16” (1.6 mm) |
| Weight | nominal: 1.2 (5.9) |
| Edge | Smooth Wall; Square Edge; Tapered Edge |
PERFORMANCE ATTRIBUTES
| R Value | °F•ft2•hr/BTU (m2•K/W): .56 |
| Humidified Deflection | ≤1/8″ (3 mm) |
| ASTM Type | ASTM C473; ASTM E661; ASTM E96; ASTM C518; ASTM C1177; ASTM C473 |
| Flame Spread & Smoke Development | (ASTM E84): 0/0 |
| Fire Rating | Type X |
| Mold Resistance | No (10/10) |
| Flexural Strength, parallel, lbf. min. (N) | ≥80 (356) |
| Flute Spanability1 | 5” (127 mm) |
| Permeance, Perms (ng/Pa•S•m2 ) | >35 (1995) |
| Linear Variation with Change in Temp., in/in/°F (mm/mm/°C) | 8.5 x 10-6 (15.3 x 106) |
| Linear Variation with Change in Moisture | 6.25 x 106 |
| Water Absorption, % max2 | <10 |
| Compressive Strength, psi nominal | 900 |
| Surface Water Absorption, grams, nominal | <2.5 |
| Bending Radius | 8’ (2438 mm) |
PHYSICAL PROPERTIES
| Length | standard: 8’ (2438 mm) ± 1/4” (6.4 mm) |
| Width | standard: 4’ (1219 mm) ± 1/8” (3 mm) |
| Thickness | nominal: 1/2” (12.7 mm) ± 1/32” (.8 mm) |
| Weight | nominal: 2.0 (9.8) |
| Edge | Smooth Wall; Square Edge; Tapered Edge |
PERFORMANCE ATTRIBUTES
| R Value | °F•ft2•hr/BTU (m2•K/W): .67 |
| Humidified Deflection | ≤1/8″ (3 mm) |
| ASTM Type | ASTM C473; ASTM E661; ASTM E96; ASTM C518; ASTM C1177; ASTM C473 |
| Flame Spread & Smoke Development | (ASTM E84): 0/0 |
| Fire Rating | Type X |
| Mold Resistance | No (10/10) |
| Flexural Strength, parallel, lbf. min. (N) | ≥100 (444) |
| Flute Spanability1 | 8” (203 mm) |
| Permeance, Perms (ng/Pa•S•m2 ) | >32 (1824) |
| Linear Variation with Change in Temp., in/in/°F (mm/mm/°C) | 8.5 x 10-6 (15.3 x 106) |
| Linear Variation with Change in Moisture | 6.25 x 106 |
| Water Absorption, % max2 | <10 |
| Compressive Strength, psi nominal | 900 |
| Surface Water Absorption, grams, nominal | <2.5 |
| Bending Radius | 12’ (3658 mm) |
PHYSICAL PROPERTIES
| Length | standard: 8’ (2438 mm) ± 1/4” (6.4 mm) |
| Width | standard: 4’ (1219 mm) ± 1/8” (3 mm) |
| Thickness | nominal: 5/8” (15.9 mm) ± 1/32” (.8 mm) |
| Weight | nominal: 2.5 (12.2) |
| Edge | Smooth Wall; Square Edge; Tapered Edge |
CERTIFICATIONS
Certifications may vary by production location, please contact local representative for more information.
1. Tested in accordance with ASTM E661.
2. Tested in accordance with ASTM C1177.
