The basic purpose of a roof cover board is to serve as a rigid substrate for the membrane. Keeping the membrane intact minimizes potential damage to the roofing system; and protects the building, contents and occupants.
DensDeck® Prime cover boards support membranes so they can resist puncture damage, allowing them to do their job as the front-line protection of the roof assembly against water intrusion.
Results of independent laboratory testing in 2014, using standard ASTM D5635 puncture test methodology1, consistently showed that thermoplastic membranes do not puncture as easily when 1/4" DensDeck® Prime Roof Boards are used as a cover board, compared to using HD ISO cover boards. Thermoplastic membranes tested in assemblies with 1/4" DensDeck® Prime panels boards underneath were 83% more puncture resistant, on average, than membranes with 1/2" HD ISO substrate or no cover board at all.
Durable and versatile DensDeck Prime roof boards can potentially save money for roofing contractors, building owners and facility managers by eliminating or reducing the need for costly repairs due to punctures during and after completion of the roof installation.
1 Puncture resistance testing conducted by Jim Koontz & Associates, July 21, 2014 to August 1, 2014, in its Hobbs, N.M. laboratory, according to ASTM D5635 standards. 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. The test method evaluates the maximum puncture load the samples can withstand, without allowing the passage of water when subjected to impact from a rigid object with sharp edges.
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.