National Gypsum Construction Guide

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High Flex ® BRAND Wallboard DESCRIPTION High Flex BRAND Wallboard consist of a fire-resistive gypsum core encased in heavy natural-finish paper on the face side and strong liner paper on the back side. The face paper is folded around the long edges to reinforce and protect the core and the ends are square-cut and finished smooth. Long edges of boards are slightly tapered, allowing joints to be reinforced and concealed with ProForm Joint Tape and joint treatment compounds. 1/4" High Flex Wallboard is specifically designed for radius construction such as curved walls, archways and stairways. It can be used for both concave and convex surfaces. 1/4" High Flex is typically applied in double layers. 1/4" High Flex Wallboard is a lightweight, cost-efficient material that readily accepts a wide range of decorative finishes. 1/4" High Flex Wallboard is easily cut for quick installation, permitting painting or other decoration and the installation of metal or wood trim almost immediately. The gypsum core is noncombustible. With joints reinforced by ProForm joint compounds, Gold Bond Gypsum Wallboard forms walls and ceilings exceptionally resistant to cracks caused by structural and thermal changes. Expansion and contraction under normal atmospheric changes is negligible. TECHNICAL DATA SURFACE BURNING CHARACTERISTICS ASTM E 84 Flame spread: 15 Smoke developed: 0 RECOMMENDATIONS Installation of Gold Bond Gypsum Wallboard should be consistent with methods described in GA216 “Recommended Specifications for the Application of Gypsum Board,” ASTM C 840, “Standard Specifications for Application and Finishing of Gypsum Wallboard” (GA214), “Recommended Levels of Gypsum Board Finish.” Exposure to extreme temperatures should be avoided. 1/4" High Flex Wallboard is not recommended where it will be exposed to temperatures exceeding 125˚F. Installing 1/4" High Flex Wallboard over an insulating blanket, installed continuously across the face of the framing members, is not recommended. Blankets should be recessed and flanges attached to the sides of the studs or joists. For best painting results, all surfaces, including joint compound, should be clean, dust-free and not glossy. To improve fastener and joint concealment, a coat of a quality latex primer is recommended to equalize the absorption between surface paper and joint compound. 1/4" High Flex Wallboard should be applied first to ceiling at right angles to framing members, then to walls. Boards of maximum practical length should be used so that an absolute minimum number of end joints occur. Board edges should be brought into contact with each other but should not be forced into place. 1/4" High Flex Wallboard is significantly more flexible in the vertical direction (long edges parallel to the framing) than in the horizontal direction. (See Table 1.) Wallboard joints at openings should be located so that no end joint will align with edges of openings unless control joints will be installed at these points. End joints should be staggered, and joints on opposite sides of a partition should not occur on the same stud. 1/4" High Flex Wallboard is typically installed in double layer construction. To prevent flat spots, framing members should be spaced closer together than required for typical flat wall and ceiling surfaces (see Table 1). 1/4" High Flex Wallboard should be held in firm contact with the framing member while fasteners are being driven. For concave surfaces, a stop shall be applied to one end of the curve to restrain one end or edge of the board during installation. Pressure shall be applied to the unrestrained end or edge of the gypsum board forcing the field of the gypsum board into firm contact with the framing. Gypsum board shall be fastened by working from the “stopped” end or edge. The gypsum board shall be held tightly against the framing while fasteners are being driven. Table 1 For convex surfaces, one end of the gypsum board shall be attached to the framing with nails or screws. The gypsum board shall be progressively pushed into contact with the framing members, working from the fixed end to the free end. The gypsum board shall be held tightly against each framing member while fasteners are being driven. Fasteners should be set with the heads slightly below the surface of the wallboard in a dimple formed by the hammer or power screwdriver. Care should be taken to avoid breaking the face paper of the wallboard. Improperly driven nails or screws should be removed. MINIMUM BENDING RADII FOR 1/4" HIGH FLEX WALLBOARD Lengthwise Widthwise Bend Max. Stud Bend Max. Stud Application Radii Spacing Radii Spacing Inside (Concave) Dry 32" 9" o.c. 20" 9" o.c. Outside (Convex) Dry 30" 9" o.c. 15" 8" o.c. Inside (Concave) Wet 20" 9" o.c. 10" 6" o.c. Outside (Convex) Wet 14" 6" o.c. 7" 5" o.c. Lengthwise denotes long edges perpendicular to the framing members. Widthwise denotes long edges parallel to the framing members. The values listed in Table 1 were achieved at 65° F and 45% relative humidity. Lower temperatures and lower humidity will decrease the flexibility. Wetting the board is only required on extremely tight radii, or when temperature and humidity conditions are lower than 65° F and 45% relative humidity. When wetting the board, apply 10-15 ounces of clean water per side with a paint roller or sprayer. Allow to soak 10-15 minutes before bending. 74 NATIONAL GYPSUM WALLBOARD PRODUCTS
09 29 00/NGC BUYLINE 1100 SPECIFICATIONS THE FOLLOWING PARAGRAPHS ARE FOR INSERTION INTO SECTIONS OF GENERIC SPECIFICATIONS OR GENERIC/PROPRIETARY SPECIFICATIONS COVERING GYPSUM WALLBOARD PRODUCTS. THE NATIONAL GYPSUM PRODUCT NAME FOLLOWS THE GENERIC DESCRIPTION IN PARENTHESES. PART 2 PRODUCTS 2.01 MATERIALS A. Flexible Gypsum Board: A gypsum core wall board with additives to enhance flexibility surfaced with paper on front, back and long edges and complying with ASTM C 36/ C 1396. (High Flex BRAND Wallboard). 1. Thickness: 1/4" 2. Width: 4' 3. Length: 8' through 12' 4. Edges: Slightly tapered PART 3 EXECUTION 3.01 INSTALLATION A. General: In accordance with the manufacturer’s recommendations, National Gypsum Company “Gypsum Construction Guide.” 09 29 00 NATIONAL GYPSUM WALLBOARD PRODUCTS 75
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10 TH EDITION National Gypsum Const
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GENERAL REFERENCE National Gypsum C
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PRODUCT SPECIFICATION DIRECTORY GEN
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GENERAL REFERENCE LATH, DRYWALL JOI
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Key to Federal Specification Design
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QUICK SELECTOR INDEX - FIRE/SOUND G
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QUICK SELECTOR FOR FIRE AND SOUND R
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GENERAL REFERENCE QUICK SELECTOR FO
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GENERAL REFERENCE Gypsum Wallboard
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Page 25 and 26: GENERAL REFERENCE QUICK SELECTOR FO
Page 27 and 28: GENERAL REFERENCE Gypsum Wallboard
Page 29 and 30: 10 TH EDITION 06 16 43/NGC BUYLINE
Page 31 and 32: LIMITATIONS 1. Gypsum Sheathing is
Page 35 and 36: Basecoat Plasters 09 23 00/NGC BUYL
Page 37 and 38: Gypsum Lath/Wood Framing DESCRIPTIO
Page 39 and 40: Fireproofing Columns and Beams with
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Page 45 and 46: Veneer Plaster System Components 09
Page 47 and 48: Veneer Plaster Accessories Used in
Page 49 and 50: DETAILS 09 26 13/NGC BUYLINE 1100 K
Page 51 and 52: STA-SMOOTH PAPER TAPE TREATMENT MET
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Page 55 and 56: INSTALLATION KAL-KORNER BEAD 09 26
Page 59 and 60: 09 29 00/NGC BUYLINE 1100 Descripti
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Page 63 and 64: 09 29 00/NGC BUYLINE 1100 METRIC CA
Page 65 and 66: Gold Bond ® BRAND Gypsum Wallboard
Page 67 and 68: Sta-Smooth BRAND Wallboard 09 29 00
Page 69 and 70: INSTALLATION 09 29 00/NGC BUYLINE 1
Page 71 and 72: Gold Bond ® BRAND MR ® Board - Mo
Page 73 and 74: DETAILS 09 29 00/NGC BUYLINE 1100 T
Page 75: Gold Bond ® BRAND 1" Fire-Shield
Page 79 and 80: Hi-Abuse BRAND XP Wallboard 09 29 0
Page 81 and 82: Hi-Abuse XP Wallboard must be kept
Page 83 and 84: Hard Body Impact - Industry Propose
Page 85 and 86: Gridstone ® BRAND Ceiling Panels 0
Page 87 and 88: Gridstone ® BRAND Hi-Strength Ceil
Page 89 and 90: GYPSUM SYSTEMS Nonload-Bearing Stee
Page 91 and 92: 09 29 00/NGC BUYLINE 1100 SINGLE LA
Page 93 and 94: Accessories 09 29 00/NGC BUYLINE 11
Page 95 and 96: 09 29 00/NGC BUYLINE 1100 DRYWALL C
Page 97 and 98: INSTALLATION SHELF BRACKET STEEL ST
Page 99 and 100: INSTALLATION 09 29 00/NGC BUYLINE 1
Page 101 and 102: 09 29 00/NGC BUYLINE 1100 RECOMMEND
Page 103 and 104: Wood Frame Walls and Ceilings/Doubl
Page 105 and 106: Resilient Furring Channel Construct
Page 107 and 108: Wallboard Over Masonry 09 29 00/NGC
Page 109 and 110: Solid Laminated Partitions 09 29 00
Page 111 and 112: ProForm ® BRAND Joint Treatment 09
Page 113 and 114: TECHNICAL DATA SPECIFICATIONS 09 29
Page 115 and 116: ProForm ® BRAND Texture Products D
Page 117 and 118: RECOMMENDATIONS 09 29 00/NGC BUYLIN
Page 119 and 120: 09 29 00/NGC BUYLINE 1100 LEVEL 5 A
Page 121 and 122: D.Fire-Resistant Mold-Resistant Gyp
Page 123 and 124: 10 TH EDITION 09 21 16.23/NGC BUYLI
Page 125 and 126: VIEW A-A 09 21 16.23 /NGC BUYLINE 1
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09 21 16.23/NGC BUYLINE 1100 I STUD
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09 21 16.23/NGC BUYLINE 1100 Elevat
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1/2" FIRE-SHIELD C GYPSUM WALLBOARD
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09 21 16.23/NGC BUYLINE 1100 I-STUD
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09 21 16.23/NGC BUYLINE 1100 DUCT b
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Horizontal Shaftwall Duct and Ceili
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10 TH EDITION 09 21 16.33/NGC BUYLI
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09 21 16.33/NGC BUYLINE 1100 AREA S
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2" H-STUD INTERIOR GYPSUM FACINGS A
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10 TH EDITION PermaBase® BRAND Cem
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09 28 00/NGC BUYLINE 1854 Can be u
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09 28 00/NGC BUYLINE 1854 FLOOR UND
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WATER-MANAGED, HIGH-IMPACT RESISTAN
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PERMABASE ® BRAND CEMENT BOARD TEC
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09 28 00/NGC BUYLINE 1854 INSTALLAT
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10 TH EDITION Index A Accessories .
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Lath ceilings, suspended ..........
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INDEX OF CAD DETAIL DRAWINGS DETAIL
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NATIONAL GYPSUM HAS THE ANSWERS TO
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