RECOMMENDED SPECIFICATION FOR MAXXON® FLOOR UNDERLAYMENT OVER ACOUSTI-MAT® 3 SOUND DEADENING PAD
SUMMARY
This is the recommended specification for Maxxon Underlayment over Acousti-Mat 3 sound deadening pad.
SECTION INCLUDES
- Maxxon Underlayment gypsum cement
- Acousti-Mat 3
- Maxxon Floor Primer
- Maxxon Overspray
- Reinforcement Mesh
QUALITY ASSURANCE
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.
Acousti-Mat 3 Installer's Qualifications: Installation of Acousti-Mat 3 shall be by an applicator
authorized by the Maxxon Corporation.
DELIVERY, STORAGE AND HANDLING
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.
SITE CONDITIONS
Environmental Requirements: Before, during and after installation of Maxxon Underlayment
and Acousti-Mat 3, building interior shall be enclosed and maintained at a temperature above 50
degrees F (10 degrees C).
PRODUCTS
MATERIALS
Gypsum Cement: Maxxon Underlayment gypsum cement as manufactured by the Maxxon
Corporation, Hamel, MN. All others must receive prior approval.
Sound Deadening Pad: Acousti-Mat 3 as manufactured by the Maxxon Corporation,
Hamel, MN.
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.
Mix Water: Potable, free from impurities
Subfloor Primer: Maxxon Floor Primer
Sealer: Maxxon Overspray
Reinforcement Mesh: Galvanized diamond metal lath 3.4 lbs/sq. yd. or Maxxon Crack
Suppression Mat (CSM)
Mix Designs
General Requirements: Mix proportions and methods shall be in strict accordance with product
manufacturer recommendations.
EXECUTION
PREPARATION
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 crew.
Leak Prevention: Fill cracks and voids with a quick setting patching or caulking material where
leakage of Maxxon Underlayment could occur.
Expansion Joints: Allow joints to continue through the Maxxon Underlayment at the same
width.
APPLICATION OF ACOUSTI-MAT 3
Installation of Acousti-Mat 3: Install Acousti-Mat 3 as recommended by the Maxxon
Corporation.
APPLICATION OF CEMENTITIOUS FLOORING
Scheduling: Application of Maxxon 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. Schedule the
Acousti-Mat 3 sound control system as late as possible in the construction cycle.
Priming Acousti-Mat 3: Prime Acousti-Mat 3 using the Maxxon Floor Primer to bond the
Maxxon Underlayment to the mat.
Maxxon Underlayment Application: Place Maxxon Underlayment 1 1/2 inches (38 mm) thick
over loosely laid reinforcement mesh. The reinforcement mesh must be overlapped at all seams.
The minimum thickness of Maxxon Underlayment over the Acousti-Mat 3 and reinforcement
mesh is l 1/2 inches (38 mm). Spread and screed the Maxxon Underlayment to a smooth
surface.
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 1/2 inches thick
(38 mm) Maxxon Underlayment, 7-10 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 a 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.
PREPARATION FOR INSTALLATION OF GLUE DOWN FLOOR GOODS
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.
Floor Goods Procedures: See 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.
FIELD QUALITY CONTROL
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.
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 ASTM C 472. Test results shall be available to
architect and/or contractor upon request from applicator.
PROTECTION
Protection From Heavy Loads: During construction, place temporary wood planking over
Maxxon Underlayment wherever it will be subject to heavy wheeled or concentrated loads.