GYPSUM CEMENTITIOUS UNDERLAYMENT

RECOMMENDED SPECIFICATION FOR MAXXON® FLOOR UNDERLAYMENT OVER ENKASONIC® SOUND DEADENING PAD

PART 1   GENERAL

1.01     SUMMARY

A.   This is the recommended specification for Maxxon Floor Underlayment over
Enkasonic sound deadening pad.

1.02       SECTION INCLUDES

A.   Maxxon Floor Underlayment gypsum cement

B.   Enkasonic

C.   Maxxon Floor Primer

D.   Maxxon Overspray

1.03       QUALITY ASSURANCE

A.   Maxxon Floor Underlayment Installer's Qualifications: Installation of Maxxon Floor Underlayment shall be by an applicator authorized by the Maxxon Corporation using Maxxon approved mixing and pumping equipment.

B.   Enkasonic Installer's Qualifications: Installation of Enkasonic 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 Floor Underlayment and Enkasonic, building interior shall be enclosed and maintained at a temperature above 50 degrees F (10 degrees C).

PART 2   PRODUCTS

2.01     MATERIALS

A. Gypsum Cement: Floor underlayment gypsum cement as manufactured by the Maxxon Corporation, Hamel , MN . All others must receive prior approval.

B.   Sound Deadening Pad: Enkasonic 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.   Subfloor Primer: Maxxon Floor Primer

F.   Sealer: Maxxon Overspray

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 Floor Underlayment crew.

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

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

3.02   APPLICATION OF ENKASONIC

A.   Enkasonic Installation: Install Enkasonic following manufacturers recommendations and specifications.

3.03   APPLICATION OF CEMENTITIOUS FLOORING

A.  Scheduling: Application of Maxxon Floor Underlayment 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. If Enkasonic is to be installed before drywall, then 3.4 lb. sq. yd. galvanized metal lath must be loose laid over the entire Enkasonic surface. Schedule the Enkasonic sound control system as late as possible in the construction cycle.

B.   Priming Enkasonic: Prime Enkasonic using the Maxxon Floor Primer to bond the
Maxxon Floor Underlayment to the mat.

C. Application: Place Maxxon Floor Underlayment a minimum 1 1/2 inch (38 mm) thick over Enkasonic. Spread and screed Maxxon Floor Underlayment to a smooth surface.

D.   Drying: General Contractor shall provide continuous ventilation and adequate heat to rapidly remove moisture from the area until the Maxxon Floor Underlayment is dry. General Contractor shall provide mechanical ventilation if necessary. Under the above conditions, for 1 1/2 inch thick Maxxon Floor Underlayment, 10-14 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 10-14 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 Floor 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 Floor 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 Floor Underlayment wherever it will be subject to heavy wheeled or concentrated loads.

END OF SECTION