GYPSUM CEMENTITIOUS UNDERLAYMENT
RECOMMENDED SPECIFICATION FOR RAPID RADIANT® UNDERLAYMENT AS THE HEAT MASS FOR RADIANT FLOOR HEATING
PART 1 GENERAL
1.01 SUMMARY
A. This is the recommended specification for Rapid Radiant® Underlayment as the heat mass for radiant floor heating.
1.02 SECTION INCLUDES
A. Rapid Radiant Gypsum Cement
B. Manufacturer Approved Primer
C. Manufacturer Approved Sealer
1.03 QUALITY ASSURANCE
A. Installer's Qualifications: Installation of Rapid Radiant shall be by an applicator authorized by Rapid Floor Systems using approved mixing and pumping equipment.
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 Rapid Radiant, 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 Rapid Radiant gypsum cement as manufactured by Rapid Floor Systems, Hamel, MN. All others must receive prior approval.
B. Sand Aggregate: Sand shall be 1/8 inch (3 mm) or less, washed masonry or plaster sand, meeting requirements of Rapid Floor Systems Sand Specifications 101.
C. Mix Water: Potable, free from impurities.
D. Subfloor Primer: Manufacturer Approved Primer
E. Sealer: Manufacturer Approved Sealer
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 Rapid Radiant underlayment crew.
B. Leak Prevention: Fill cracks and voids with a quick setting patching or caulking material where leakage of Rapid Radiant could occur.
C. Priming Subfloor: Prime the subfloor using Manufacturer Approved Primer. Priming instructions may vary according to the type of substrate, multiple coats may be necessary.
D. Expansion Joints: Allow joints to continue through the Rapid Radiant at the same width.
3.02 APPLICATION OF CEMENTITIOUS FLOORING
A. Scheduling: Application of Rapid Radiant 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 Rapid Radiant heat mass at 3/4" (19 mm) minimum over the tops of the heating tubes or cables. Rapid Radiant can be installed in two lifts. Install the first lift (pour) to the top of the tubing or cable, then allow to set-up. Maxxon Set Modifier may be used to accelerate the set-time of the first lift per Rapid Floor Systems recommendations. Install the second lift 3/4 inch (19 mm) above the first lift. Spread and screed Rapid Radiant to a smooth surface.
C. Drying: General Contractor shall provide continuous ventilation and adequate heat to rapidly remove moisture from the Rapid Radiant until it is dry. General Contractor shall provide mechanical ventilation if necessary. The radiant heat system can be started after the Rapid Radiant sets up to accelerate the drying time. To test for dryness, tape a 24 inch by 24 inch (609 mm by 609 mm) section of plastic to the surface of the underlayment or lay a flat 24 inch by 24 inch (609 mm by 609 mm) high density, smooth rubber mat weighed down on the underlayment surface. After 48-72 hours, if no condensation occurs, the underlayment shall be considered dry. Perform dryness test 5-7 days after pour.
3.03 PREPARATION FOR INSTALLATION OF GLUE DOWN FLOOR GOODS
A. Sealing: Seal all areas that receive glue down floor goods with Manufacturer Approved Sealer according to Rapid Floor Systems 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 Attachment: See the brochure "Procedures for Attaching Finished Floor Goods" for guidelines for installing finished floor goods. This procedure is not a warranty and is to be used as a guideline only.
3.04 FIELD QUALITY CONTROL
A. Slump Test: Rapid Radiant 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 Rapid Radiant application. Cubes shall be tested as recommended by Rapid Floor Systems in accordance with modified ASTM C472. Test results shall be available to architect and/or contractor upon request from applicator.
3.05 PROTECTION
A. Protection From Heavy Loads: During construction, place temporary wood planking over Rapid Radiant wherever it will be subject to heavy wheeled or concentrated loads.
END OF SECTION
©Rapid Floor® Systems | Homepage | Rapid Radiant®