GYPSUM CEMENTITIOUS UNDERLAYMENT

RECOMMENDED SPECIFICATION FOR MAXXON® UNDERLAYMENT OVER

ACOUSTI-MAT® CLP SOUND DEADENING PAD OVER CONCRETE

PART 1    GENERAL

1.01      SUMMARY

   A.    This is the recommended specification for Maxxon Underlayment over Acousti-Mat CLP sound deadening pad over concrete.

1.02        SECTION INCLUDES

   A.    Maxxon Underlayment

   B.    Acousti-Mat CLP

   C.    Acousti-Mat CLP Adhesive

   D. Maxxon Overspray

1.03        QUALITY ASSURANCE

   A.    Maxxon Underlayment Installer's Qualifications: Installation of Maxxon Underlayment shall be by an applicator authorized by the Maxxon Corporation 

           using Maxxon approved mixing and pumping equipment.

   B.    Acousti-Mat CLP Installer's Qualifications: Installation of Acousti-Mat CLP shall be by an applicator authorized by the Maxxon Corporation.

1.04      DELIVERY, STORAGE AND HANDLING

   A.    General Requirements: Materials shall be delivered in their original, unopened packages, and protected from exposure to the elements. Damaged or

          deteriorated materials shall be removed from the premises.

1.05      SITE CONDITIONS

    A. Environmental Requirements: Before, during and after installation of Maxxon Underlayment and Acousti-Mat CLP, building interior shall be enclosed and

      maintained at a temperature above 50 degrees F (10 degrees C).

PART 2    PRODUCTS

2.01      MATERIALS

    A. Underlayment: Recommended Maxxon Underlayment as manufactured by the Maxxon Corporation, Hamel , MN . All others must receive prior approval.

    B.    Sound Deadening Pad: Acousti-Mat CLP as manufactured by the Maxxon Corporation, Hamel, MN.

    C.    Sand Aggregate: Sand shall be 1/8 inch (3 mm) or less, washed masonry or plaster sand, meeting requirements of Maxxon Corporation Sand

            Specifications 101.

    D.    Mix Water: Potable, free from impurities

    E. Adhesive: Acousti-Mat CLP Adhesive as manufactured by the Maxxon Corporation, Hamel, MN.

    D. Sealer: Maxxon Overspray as manufactured by the Maxxon Corporation, Hamel, MN.

2.02      MIX DESIGNS

   A.    General Requirements: Mix proportions and methods shall be in strict accordance with product manufacturer recommendations.

PART 3    EXECUTION

3.01    PREPARATION

   A.    Condition and Cleaning of Subfloor: Subfloor shall be structurally sound. General Contractor shall clean subfloor to remove mud, oil, grease, and other

           contaminating factors before the arrival of the Maxxon Underlayment and Acousti-Mat CLP crew.

   B.    Leak Prevention: Fill cracks and voids with a quick setting patching or caulking material where leakage of adhesive could occur.

   C.    Expansion Joints: Allow joints to continue through the Maxxon Underlayment at the same width.

3.02    APPLICATION OF ACOUSTI-MAT CLP AND REINFORCEMENT MESH

   A. Acousti-Mat CLP Installation: Install Acousti-Mat CLP following manufacturers recommendations and specifications.

3.03    APPLICATION OF CEMENTITIOUS FLOORING

    A. Scheduling: Application of Maxxon Underlayment and Acousti-Mat CLP shall not begin until the building is enclosed, including roof, windows, doors and

         other fenestration. Install after drywall installation unless tenant finish requirements identify partitioning after the pour.

   B. Application: Place the recommended Maxxon Underlayment a nominal 1/2 inch (12 mm) thick over Acousti-Mat CLP. Spread and screed Maxxon

        Underlayment to a smooth surface.

   C.  Drying: General Contractor shall provide continuous ventilation and adequate heat to rapidly remove moisture from the area until the Maxxon

         Underlayment is dry. General Contractor shall provide mechanical ventilation if necessary. Under the above conditions, for 1/2 inch thick Maxxon

         Underlayment, 5-7 days is usually adequate drying time. To test for dryness, tape a 24 inch by 24 inch (609 mm by 609 mm) section of plastic or high

         density rubber mat to the surface of the underlayment. After 48-72 hours, if no condensation occurs, the underlayment shall be considered dry. Perform

         dryness test 5-7 days after pour.

3.04    PREPARATION FOR INSTALLATION OF GLUE DOWN FLOOR GOODS

   A.    Sealing: Seal all areas that receive glue down floor goods with Maxxon Overspray according to the Maxxon Corporation's specifications. Any floor areas

           where the surface has been damaged shall be cleaned and sealed regardless of floor covering to be used. Where floor goods manufacturers require

          special adhesive or installation systems, their requirements supersede these recommendations.

   B.    Floor Goods Procedures: See the Maxxon Corporation's "Procedures for Attaching Finished Floor Goods to Maxxon Underlayments" brochure for

          guidelines for installing finished floor goods. This procedure is not a warranty and is to be used as a guideline only.

3.05    FIELD QUALITY CONTROL

   A. Slump Test: Maxxon Underlayment mix shall be tested for slump as it's being pumped using a 2 inch by 4 inch (50 mm by 101 mm) cylinder resulting in a

        patty size of 8 inches (203 mm) plus or minus 1 inch (25 mm) diameter.

   B.    Field Samples: At least one set of 3 molded cube samples shall be taken from each day's pour during the Maxxon Underlayment application. Cubes shall

          be tested as recommended by the Maxxon Corporation in accordance with modified ASTM C 472. Test results shall be available to architect and/or

          contractor upon request from applicator.

3.06    PROTECTION

   A.    Protection From Heavy Loads: During construction, place temporary wood planking over Maxxon Underlayment wherever it will be subject to heavy

          wheeled or concentrated loads.