RECOMMENDED SPECIFICATION FOR MAXXON® UNDERLAYMENT OVER ACOUSTI-MAT® CLP SOUND DEADENING PAD OVER CONCRETE
Summary
This is the recommended specification for Maxxon Underlayment over Acousti-Mat CLP sound
deadening pad over concrete.
Section Includes
- Maxxon Underlayment
- Acousti-Mat CLP
- Acousti-Mat CLP Adhesive
- Maxxon Overspray
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 CLP Installer's Qualifications: Installation of Acousti-Mat CLP 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 CLP, building interior shall be enclosed and maintained at a temperature above
50 degrees F (10 degrees C).
Products
MATERIALS
Underlayment: Recommended Maxxon Underlayment as manufactured by the Maxxon
Corporation, Hamel, MN. All others must receive prior approval.
Sound Deadening Pad: Acousti-Mat CLP 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
Adhesive: Acousti-Mat CLP Adhesive as manufactured by the Maxxon Corporation, Hamel,
MN.
Sealer: Maxxon Overspray as manufactured by the Maxxon Corporation, Hamel, MN.
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 and Acousti-Mat CLP crew.
Leak Prevention: Fill cracks and voids with a quick setting patching or caulking material where
leakage of adhesive could occur.
Expansion Joints: Allow joints to continue through the Maxxon Underlayment at the same
width.
APPLICATION OF ACOUSTI-MAT CLP AND REINFORCEMENT MESH
Acousti-Mat CLP Installation: Install Acousti-Mat CLP following manufacturers
recommendations and specifications.
APPLICATION OF CEMENTITIOUS FLOORING
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.
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.
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.
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 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.
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 modified 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.