DensDeck® Roof Board, with its high-compressive strength, provides the ideal cover board in commercial roofing assemblies where membrane, insulation and other components are vulnerable to damage caused by different types of impact - notably large-sized, fast-moving hail.
When a "large hail event" occurs, as defined by the National Weather Service1, the damage to a commercial roofing system can be catastrophic and costly. Even a single occurrence can cause cracks and punctures that can allow moisture to penetrate into the membrane and below - causing problems that are expensive to correct. This is especially true for large single-ply membrane roof systems with extensive surface area.
Extensive hail testing at the laboratories of Jim Koontz & Associates2, showed that DensDeck® Prime Roof Boards consistently display superior puncture and impact resistance, protecting thermoplastic roofing membranes better than high-density polyisocyanurate (HD ISO) cover boards.
1 National Oceanic and Atmospheric Administration, noaa.gov/features/03_protecting/hail.html
2 Hail testing (or impact resistance testing of rigid roofing materials by impacting with freezer ice balls) conducted by Jim Koontz & Associates July 21 - August 1, 2014, in its Hobbs, N.M. laboratory, according to FM 4473 (using NBS 23 standards). Based on average results using 1-1/2" to 2-1/2" freezer ice balls. Assemblies included a base layer of 2", 20-psi polyisocyanurate insulation; and configurations were covered with 45 mil thermoplastic polyolefin (TPO) or 48 mil polyvinyl chloride (PVC) membranes.
For recommendations and limitations of use for DensDeck Roof Boards, click here to download the technical brochure. Georgia-Pacific Gypsum does not warrant or provide specifications for any specific roofing assembly or any component other than DensDeck Roof Boards. Consult with the appropriate system manufacturer or design authority for system specifications and instructions.
Versatile fiberglass mat roof board. Enhanced surface treatment allows uniform spreading of adhesives for a strong, consistent bond. DensDeck Prime is an ideal cover board; or underlayment for spray foam applications, for photovoltaic, vegetative or cool roofing systems.
Durable, moisture- and mold-resistant fiberglass mat roof boards for a wide variety of roofing systems. Use for new and re-roofing applications. DensDeck provides a superior thermal barrier and is widely used in single ply, mechanically-attached systems.
What's brewing in your climate zone? See the specific benefits DensDeck® Prime Roof Board provides for the challenges of wind, fire, snow and hail in your state or province.
Click to watch a quick video demonstration showing the ease of cutting and scoring DensDeck, applying adhesives and installing it, compared side-by-side with gypsum fiberboard materials. (2:51)
Selecting DensDeck® Prime Roof Boards prove to be a good decision in the 200,000 square foot re-roofing of Detroit's Cobo Center. Hear the contractor's story first hand.
Learn more about third party test results that showed DensDeck® Prime Roof Boards offer superior protection against everyday punctures compared to HD ISO or no cover board.
Learn more about third party test results that showed DensDeck® Prime Roof Boards protect thermoplastic roofing membranes against hail damage better than HD ISO cover boards.
DensDeck® Prime roof boards can help dampen unwanted outside noise. In new construction or in retrofit applications, DensDeck® enables an innovative solution for exterior sound remediation.