GOLD BOND® BRAND GRIDSTONE® HI-STRENGTH GYPSUM CEILING PANELS National Gypsum Company Technical Information: Internet Home Page: Gold Bond® BRAND Gridstone® Hi-Strength Gypsum Ceiling Panels are prefinished ceiling panels with a non-combusti- ble high strength gypsum core formulated with increased uniformity and integrity which BASIC USES Gridstone Hi-Strength panels exterior ceiling applications spaces that receive intermit- tent exposure to moisture. Gridstone Hi-Strength panels use in food service and food processing areas. Gridstone Hi-Strength panels unexposed exterior ceiling applications such as soffits, parking garages and other non-fire rated ceiling systems. • Lightweight. Gridstone 40% lighter in weight than standard gypsum ceiling Gridstone Hi-Strength panels score and snap clean and install easily in standard exposed grid systems. white vinyl laminate elimi- nates additional finishing. GREENGUARD CERTIFIED Gridstone Hi-Strength Gypsum Ceiling Panels are GREENGUARD Children & in areas exposed to extreme or continuous moisture, such as saunas, steam rooms, gang showers and indoor pool tect grid panels from direct exposure to weather, water and continuous high humid- should water be in contact with the back of the panels. • Overlaid insulation may cause excessive panel deflection where high humidity is likely • Extreme lighting conditions may distort texture appearance. solvents (such as ketones), harsh abrasive cleaners or steel wool are not recom- mended. These materials may cause dulling, discoloration, softening and other permanent damage to the vinyl surface. Gridstone Hi-Strength panels TECHNICAL DATA PHYSICAL PROPERTIES Thickness, nomina Width, nomina Length, standard Weight, Ibs./sq.ft., nomina 2 mil white stipple vinyl laminate Surface Burning Characteristics Sound Attenuation (per ASTM E 1414) Ceiling Attenuation Class (CAC) Light Reflectance APPLICABLE STANDARDS AND REFERENCES ASTM E 1264, Type XX, Patterns E, C National Gypsum Company, Gypsum Construction Guide (Continued next page) Submittal Approvals: (Stamps or Signatures)

Gridstone Hi-Strength panels tee grid systems or environ- mental type grids for severe conditions, with grids either manufacturer's specification. Each panel must be supported Cross ventilation must be pro- vided in unheated or enclosed space above ceiling panels. General: Install panels in lay-in suspension systems with edges concealed by flanges panels to fit tightly at borders edges are concealed by trim Cleaning: Common dirt and stains on the vinyl surface can be removed with mild soap or detergent in lukewarm water. Use a light scrubbing action with a cloth, sponge or soft ing agent is unknown,...