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Georgia-Pacific fl Dec Technical Service Hotline 1.800.225.6119 or Roof Board www.densdeck.com Manufacturer Consult roofing manufacturers for their specific instructions on applying their products Georgia- Pacific Gypsum LLC to DensDeck. 133 Peachtree Street, 8th floor, Atlanta, GA 30303 The need for a separator sheet between the DensDeck and the roofing membrane Technical Service Hotline 1- 800 - 225 -6119 or www.densdeck.com shall be determined by the roof membrane manufacturer or roofing systems designer. Description DensDeck roof board products may have temporary factory - applied packaging (plastic DensDeck® Roof Board is an exceptional fire barrier, thermal barrier, coverboard and wrap) that must be removed upon receipt to prevent accumulation or entrapment of recovery board used in various commercial roofing systems. The patented DensDeck condensation or moisture which may cause application problems. Provide other design employs glass mat facings front and back that are mechanically bonded to a suitable breathable weather protection for storage to keep DensDeck products dry. water - resistant gypsum core, providing excellent fire resistance, moisture resistance and wind uplift properties. The unique construction of DensDeck provides superior Panels must be kept dry before, during and after installation_ Apply only as much flute spanning that stiffens and provides increased foot traffic resistance to the roof DensDeck as can be covered by a roof membrane system in the same day. deck. Additionally, DensDeck has been shown to withstand delamination, deterioration, Accumulation of water due to leaks or condensation in or on DensDeck must be warping and job -site damage more effectively than roofing membrane substrates such avoided during construction and after construction. Avoid over use of non vented dite insulation. DensDeck is highly direct -fired heaters during winter months. Avoid application of DensDeck during as paperfaced gypsum board, fiberboard and pe resistant to the growth of mold when tested, as manufactured, per ASTM D 3273. rains, heavy fogs and other conditions that may deposit moisture on the surface. When applying solvent -based adhesives or primers, allow sufficient time for the Primary Uses solvent to flash off to avoid damage to roofing components. Maximum flute span Roof system manufacturers and designers have found DensDeck Roof Board to be is 2 -5/8" (66.7 mm) for 1/4" (6.4 mm) DensDeck; 5" (127 mm) for 1/2" (12.7 mm) compatible with many types of roofing systems, including: built -up, modified bitumen, DensDeck; and 8" (203 mm) for 5/8" (15.9 mm) DensDeck® Fireguard® Type X single ply, metal systems, wood shingle and shake, tile, slate, as wet as a recovery Roof Board. board and overlayment protection board for polyisocyanurate and polystyrene insulation. For vertical parapet applications, 1/2" (12.7 mm) DensDeck can span 16" oc (406 mm) DensDeck can also be used as a form board for poured gypsum concrete deck in and 5/8" (15.9 mm) DensDeck can span 24" oc (610 mm). roof applications as well as a substrate for spray foam roofing systems. 1/2" (12.7 mm) DensDeck, DensDeck® Prime and DensDeck® DuraGuard roof boards should not be and 5/8" (15.9 mm) DensDeck may also be used in vertical applications as a backer subjected to abnormal or excessive loads or foot traffic such as on plaza decks or board or liner for the roof side of parapet walls. under steel wheeled equipment that may fracture or damage the panels. Provide Some membrane manufacturers have hot mop asphalt or torch applications directly suitable roofing system protection when required. to DensDeck without using a primer or base sheet. Consult with the system manu- facturer for their recommendations with this application. System manufacturers Technical Data Flame spread 0, smoke developed 0, when tested in accordance with ASTM E 84 or and designers have found DensDeck to be compatible with bonding adhesives for fully - adhered single -ply membrane applications. The exceptional moisture resistance CAN /ULC S102. Noncombustible when tested in accordance with ASTM E 136. and low R -value of DensDeck make it the preferred substrate for vapor retarders. DensDeck Fireguard Type X: UL Classified when tested in accordance with ASTM E An excellent fire barrier, DensDeck features a noncombustible core and inorganic 119.5/8" (15.9 mm) DensDeck can replace any generic Type X gypsum board in any roof surface that offers greater fire protection than other conventional commercial roofing assembly in the UL Fire Resistance Directory under the prefix "P" products when applied over combustible roof decks and steel decks. DensDeck is 1/4" (6.4 mm) DensDeck has been tested by Factory Mutual for 60 psf and 90 psf FM tested. wind uplift for BUR, EPDM, thermoplastics and modified bitumen roof systems. Higher wind uplift ratings have been achieved by numerous membrane manufacturers using Limitations DensDeck in their FMRC - approved construction designs. DensDeck Roof Board is designed to act with a properly designed roof system. The DensDeck is FM tested and approved as the only 1/2" (12.7 mm) gypsum product to actual use of DensDeck as a roofing component is the responsibility of the roofing meet the calorimeter requirements for conventionally insulated decks. system's designing authority. Georgia - Pacific does not offer roofing system design Miami -Dade County, Florida NOA 07 -0124.02 services. Conditions beyond the control of Georgia- Pacific such as weather conditions, dew, application temperatures and techniques may cause adverse effects with adhered roofing systems. 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