3.2.4
Semi-Solid Gypsum Board Partitions
Provide in accordance with ASTM C 840, System IV or GA 216 .
3.2.5
Solid Gypsum Board Partitions
Provide in accordance with ASTM C 840, System V or GA 216.
3.2.6
Adhesive Application to Interior Masonry or Concrete Walls
Apply in accordance with ASTM C 840, System VI or GA 216.
3.2.7
Application of Gypsum Board to Steel Framing and Furring
Apply in accordance with ASTM C 840, System VIII or GA 216.
3.2.8
Arches and Bending Radii
Apply gypsum board in accordance with ASTM C 840, System IX or GA 216.
3.2.9
Gypsum Board for Wall Tile or Tile Base Applied with Adhesive
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NOTE: For adhesive applied ceramic tile in wet areas
(tubs, shower enclosures, saunas, steam rooms, gang
shower rooms), specify cementitious backer board
(ANSI A108.1) as the substrate; specify ASTM C
1178/C 1178M glass mat water-resistant backing board
or ASTM C 630/C 630M water-resistant gypsum backing
board for other tiled areas including areas where
only ceramic or quarry tile base is to be installed.
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In dry areas (areas other than tubs, shower enclosures, saunas, steam
rooms, gang shower rooms), apply glass matt water-resistant gypsum tile
backing board [or water-resistant gypsum backing board] in accordance with
ASTM C 840, System X or GA 216.
3.2.10
Exterior Application
Apply exterior gypsum board (such as at soffits) in accordance with ASTM C
840, System XI or GA 216.
3.2.11
Glass Mat Covered or Fiber Reinforced Gypsum Sheathing
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NOTE: Choose the bracketed option below if sealant
will be applied to sheathing joints and penetrations
in addition to the asphalt impregnated building felt.
**************************************************************************
Apply gypsum sheathing in accordance to gypsum association publication GA
253. Design details for joints and fasteners shall follow gypsum sheathing
manufacturer's requirements and be properly installed to protect the
substrate from moisture intrusion. Exposed surfaces of the gypsum sheathing
shall not be left exposed beyond the manufacture's recommendation without a
weather barrier cladding. Provide continuous asphalt impregnated building
felt over sheathing surface in shingle fashion with edges and ends lapped a
SECTION 09250
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