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B.

Vapor Proofing Mastic:

1.

Mastic must have the following qualities:

a.

Water Vapor Transmission Rate:

ASTM E 96

0.3 perms or lower

2.

Stego Mastic by Stego Industries LLC

  • E.

    Pipe Boots

    • 1.

      Construct pipe boots from vapor barrier material, pressure sensitive tape and/or mastic per manufacturer's instructions.

PART 3

EXECUTION

    • 3 .1

      PREPARATION

      • A.

        Ensure that subsoil is approved by Architect or Geotechnical Engineer.

        • 1.

          Level and tamp or roll aggregate, sand or granular base.

    • 3.2

      INSTALLATION

      • A.

        Install vapor barrier in accordance with manufacturer's instructions and ASTM E 1643-98

        • (2005)

          .

        • 1.

          Unroll vapor barrier with the longest dimension parallel with the direction of the concrete pour.

        • 2.

          Lap vapor barrier over footings and/or seal to foundation walls.

        • 3.

          Overlap joints 6 inches and seal with manufacturer's tape.

        • 4.

          Seal all penetrations (including pipes) per manufacturer's instructions.

        • 5.

          No penetration of the vapor barrier is allowed except for reinforcing steel and permanent utilities.

        • 6.

          Repair damaged areas by cutting patches of vapor barrier, overlapping damaged area 6 inches and taping all four sides with tape.

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