DensDeck® Roof Board
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The right choice for resilient roofs
Check out this video to see how DensDeck® Roof Boards can help your roof reach its maximum life expectancy ... and why they outperform alternatives.Strength and durability
Compressive strength measures the amount of force a material can withstand before it cracks or breaks. The higher it is, the better a material will be at resisting punctures, supporting static equipment and handling the burden of foot traffic.Flexural strength determines the flex or bending properties of a material. Higher flexural strength can increase a cover board’s flute-span capability while guarding against wind uplift. This helps protect your roof from membrane delamination and fastener withdrawal.
Flute-span capability is a material’s ability to handle loads across a metal roof deck’s gaps (flutes) where it is not supported by the top flange.
Benefits to your roofing system and the entire building
Enhanced durability
The compressive strength of DensDeck® Roof Boards helps fight the risk of punctures from heavy foot traffic and dropped tools during maintenance. This means fewer callbacks for you and more satisfied stakeholders.
Increased life expectancy
Cover boards extend the life of a roof. 86% of single-ply roofs with a cover board met owner life expectancy compared to only 52% of roofs without a cover board.¹
Noncombustible
DensDeck® Roof Boards are noncombustible per ASTM E136. Their gypsum core and fiberglass mat facers help slow the spread of flames and smoke.
Consistent substrate
DensDeck® Roof Boards’ gypsum core helps provide a rigid, consistent substrate for attaching photovoltaic systems and more rooftop installations.
Improved acoustics
Using rigid gypsum cover boards like DensDeck® Roof Boards can help absorb sound, which means occupants hear less outside noise.
SOURCE:
1. FMI Roof Cover Board Survey completed in May 2020. Actual results may vary.
Watch how DensDeck® Roof Boards are put to the test
Fire resistance
One of the most dangerous threats to a commercial low-slope rooftop is the risk of catching fire. See how DensDeck® Roof Boards perform in fire testing.
Wind resistance
Wind uplift can cause membrane delamination and fastener withdrawal. See how DensDeck® Roof Boards give you a rigid base of support, a superior bonding surface and enhanced strength to mitigate damage.
Puncture resistance
While small punctures may not look threatening, they can lead to serious problems over time. See how DensDeck® Roof Boards outperform HD ISO in puncture tests.
Hail resistance
DensDeck® StormX® Prime Roof Board was the first cover board to be FM classified for Very Severe Hail (VSH) in approved single-ply assemblies. It helps provide impact protection to both the membrane and insulation of your roofing system.
See how they stack up
Durable low-slope roofs should be able to stand strong against wind uplift, impact from flying debris, punctures, the spread of fire and extreme hail. They should also be able to support heavy equipment like HVAC systems and solar panels. Densdeck® Roof Boards Fiberglass Mat Gypsum Substrate |  HD ISO HIGH-DENSITY Foam Insulation | |
|---|---|---|
Compressive Strength Higher compressive strength helps resist punctures, support static equipment, and protect projects from heavy foot traffic. | 900 - 1,800 PSI | 80 - 120 PSI |
Thermal Resistance The higher the thermal resistance, the lower the heat loss. | 1.1 R-VALUE PER INCH | 4+ R-VALUE PER INCH |
Fire Resistance Just because a material is fire-resistant doesn’t mean it can’t burn. | NONCOMBUSTIBLE | FIRE-RESISTANT |
Mold Resistant The ability of a material or surface to discourage mold growth. | ||
FM Approved For Very Severe Hail (VSH) VSH starts at 2 inches but may exceed 4 inches in diameter. | Densdeck® StormX® Prime Roof Board |
Densdeck® Roof Boards Fiberglass Mat Gypsum Substrate |  OSB Foam Insulation | |
|---|---|---|
Compressive Strength Higher compressive strength helps resist punctures, support static equipment, and protect projects from heavy foot traffic. | 900 - 1,800 PSI | 1,500 - 2,500 PSI |
Thermal Resistance The higher the thermal resistance, the lower the heat loss. | 1.1 R-VALUE PER INCH | 0.6 R-VALUE PER INCH |
Fire Resistance Just because a material is fire-resistant doesn’t mean it can’t burn. | NONCOMBUSTIBLE | FLAMMABLE |
Mold Resistant The ability of a material or surface to discourage mold growth. | ||
FM Approved For Very Severe Hail (VSH) VSH starts at 2 inches but may exceed 4 inches in diameter. | Densdeck® StormX® Prime Roof Board |
Densdeck® Roof Boards Fiberglass Mat Gypsum Substrate |  Cement Foam Insulation | |
|---|---|---|
Compressive Strength Higher compressive strength helps resist punctures, support static equipment, and protect projects from heavy foot traffic. | 900 - 1,800 PSI | 1,000 - 1,250 PSI |
Thermal Resistance The higher the thermal resistance, the lower the heat loss. | 1.1 R-VALUE PER INCH | 0.8 - 1.2 R-VALUE PER INCH |
Fire Resistance Just because a material is fire-resistant doesn’t mean it can’t burn. | NONCOMBUSTIBLE | NONCOMBUSTIBLE |
Mold Resistant The ability of a material or surface to discourage mold growth. | ||
FM Approved For Very Severe Hail (VSH) VSH starts at 2 inches but may exceed 4 inches in diameter. | Densdeck® StormX® Prime Roof Board |
Four options based on your performance needs
If a building owner is going to resell the building immediately, they might not care how long the roof lasts or how resilient it is. But if they’re going to treat the building as a long-term asset, including a DensDeck® Roof Board will help it last as long as possible.
DensDeck® Roof Board
Georgia-Pacific redefined roof boards in 1987 with DensDeck® Roof Board. This innovative cover board provides stronger puncture protection and is non-combustible as a result of its gypsum core.
DensDeck® Prime Roof Board
Building on the legacy of DensDeck® Roof Board, DensDeck® Prime Roof Board offers even more strength and superior mat to core bond on both sides of the board.
DensDeck® ProFast™ Prime Roof Board
DensDeck® ProFast™ Prime Roof Board addresses demand for material and labor cost efficiencies and easier-to-use products. It’s approximately 20% lighter than 1/2″and in testing conducted to date, it has shown a 25%-75% reduction in the number of fasteners needed in singly ply (partially adhered) assemblies.2
2.Compared to assemblies using 1/2” DensDeck® Prime Roof Board, specifically when the cover board is mechanically attached (adhered cover). The 25%-75% reduction in fasteners is based on FM testing with multiple roofing assemblies using #15 fasteners and 3” metal flat bottom plates.
Support when you need it
From helping you talk to building owners to providing technical resources to field support—we’re here to help. Watch the video to hear what you get when you work with Georgia-Pacific Gypsum products.To see how DensDeck® Roof Board can benefit your next project, get in touch now.
