DensDeck® ProFast™ Prime Roof Board
- Innovative lightweight design, approximately 20% lighter than 1/2″ DensDeck® Prime Roof Board, for easier handling and installation.1
- Enhanced maneuverability reduces transport and installation challenges without sacrificing strength or durability.
- Reduces fastener use by 25–60%, lowering material costs and improving installation efficiency.2
- Specifically engineered for mechanically attached roofing assemblies.
Product Details
DensDeck® ProFast™ Prime Roof Board is an innovative, lightweight roofing solution designed to enhance performance, efficiency and cost savings in roofing applications. Approximately 20% lighter than the 1/2” DensDeck® Prime Roof Board, it offers enhanced maneuverability, making it easier to transport, handle and install without compromising strength, durability or dimensional stability when installed in a properly designed roof assembly. Specifically engineered for mechanically attached roofing systems, as well as adhered and partially adhered (hybrid) assemblies, DensDeck® ProFast™ Prime Roof Board offers exceptional resistance to fire, wind uplift, punctures and hail. By reducing the number of fasteners needed by 25–60% (subscript 1), it significantly lowers material expenses and installation labor, contributing to optimized project timelines and budgets.
DensDeck® ProFast™ Prime Roof Board represents the next evolution in roof board technology, offering material and labor efficiencies alongside the trusted quality of the DensDeck® product family. This innovative lightweight roofing solution has been specifically engineered for mechanically attached roofing systems, as well as adhered and partially adhered assemblies, DensDeck® ProFast™ Prime Roof Board offers exceptional resistance to fire, wind-uplift, punctures, and hail.
FEATURES AND BENEFITS
- Lighter Board: Easier to handle, transport and install. Helps Reduce physical strain and could speed up installation processes.
- Reduce Project Costs: Helps reduces material consumption and installation labor costs, helping to optimize project budgets and lower overall expenses.
- Reduced Fasteners: Can reduce the number of fasteners by 30% to 50%3
- Load Optimization: Requires less space on a truck.
Product Specifications
PERFORMANCE ATTRIBUTES
| R Value7 | ft2•°F•hr/BTU (m2•K/W): 0.33 |
| ASTM Type | ASTM C1177 |
| Surfacing | Fiberglass mat with non-asphaltic coating |
| Mold Resistance10 | 10 (highest possible) |
| Flexural Strength4 parallel, lbf. min. (N) | parallel, lbf. min. (N): ≥100 (444) |
| Flute Spanability5 | 5″ (127 mm) |
| Permeance6, Perms (ng/Pa•S•m2 ) | >30 (>1710) |
| Linear Variation with Change in Temp., in/in/°F (mm/mm/°C) | 8.5 x 106 (15.3 x 106) |
| Linear Variation with Change in Moisture | 6.25 x 106 |
| Water Absorption8, % max | 5 |
| Compressive Strength, psi nominal | 880 |
| Surface Water Absorption, grams, nominal | 1 |
PHYSICAL ATTRIBUTES
| Thickness | nominal: 3/8″ (9.5 mm) ± 1/32″ (.8 mm) |
| Width | standard: 4′ (1219 mm) ± 1/8″ (3 mm) |
| Length | standard: 8″ (2438 mm) ± 1/4″ (6.4 mm) |
| Weight | nominal (lbs./sq. ft. (Kg/m2): 1.64 (8) |
CERTIFICATIONS
1. Based on FM testing with multiple roofing assemblies using #15 fasteners and 3” metal flat-bottom plates in April 2025.
2. Compared to 1/2” DensDeck® Prime Roof Board.
3. Compared to assemblies using 1/2” DensDeck® Prime Roof Board, specifically when the cover board is mechanically attached. The 30% to 50% reduction in fasteners is based on third-party testing with multiple roofing assemblies.
4. Tested in accordance with ASTM C473 method B.
5. Tested in accordance with ASTM E661.
6. Tested in accordance with ASTM E96 (dry cup method).
7. Tested in accordance with ASTM C518 (heat flow meter).
8. Specified values per ASTM C1177.
9. Tested in accordance with ASTM C473.
10. When tested, as manufactured, in accordance with ASTM D3273, DensDeck Roof Boards have scored a 10, the highest level of performance for mold resistance under the ASTM D3273 test method. The score of 10, in the ASTM D3273 test, indicates no mold growth in a 4-week controlled laboratory test. The mold resistance of any building product when used in actual job site conditions may not produce the same results as were achieved in the controlled, laboratory setting. No material can be considered mold proof. For additional information, go to www.buildgp.com/safetyinfo.
Certifications may vary by production location, please contact local representative for more information.
