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joint compound.

4. Cementitious Backer Board: Prepare and finish joints in accordance with manufacturer's instructions

.

  • 5.

    Veneer Plaster Finishing: Reinforcing Tape:

    • 1.

      Install full length over all gypsum base and cement board joints, including internal corners. Do not overlap at intersections.

    • 2.

      Butter joints with setting-type joint compound, press Sheetrock joint tape into compound; apply skim coat of compound over tape.

  • 6.

    Joint Compound:

1. After skim coat sets, apply finish coat of compound feathering 3 to 4 inches beyond tape edges.

2. Feather coats onto adjoining surfaces so that camber is maximum 1/32 inch.

    • 3.

      Allow joint compound to completely set before applying veneer plaster finish.

  • 7.

    Trim:

1. Use same fasteners to anchor trim accessory flanges as required to fasten gypsum board to supports, unless otherwise recommended by trim manufacturer.

  • 2.

    Install metal corner beads at external corners.

  • 3.

    Install metal casing bead trim whenever edge of gypsum base would

otherwise be exposed or semi-exposed, and where gypsum base terminates against dissimilar material.

  • 8.

    Control Joints: Install where indicated and specified.

  • 9.

    Special Trim and Reveal Joints: Install as indicated on Drawings and in

accordance with manufacturer's instructions.

  • 8.

    VENEER PLASTER APPLICATION

  • 1.

    Apply veneer plaster in accordance with ASTM C843, except for more

stringent requirements of manufacturer or these specifications. Apply 1 or 2-coat system of uniform thickness as indicated.

  • 2.

    Mixing:

    • 1.

      Use mechanical mixers for mixing plaster in accordance with USG recommendations.

2. Clean mechanical mixers, mixing containers and tools after mixing each batch; keep free of plaster from previous mixes.

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