Preparation of Concrete Slabs to Receive Resilient Flooring
The complete current edition of ASTM F710 is available from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken PA 19428.http://astm.org/
- Dry, clean, smooth, and structurally sound
- Free of dust, solvent, paint, wax, oil, grease, residual adhesive, adhesive removers; curing, sealing, hardening, or parting compounds; alkaline salts, excessive carbonation or laitance, mold, mildew, and other foreign materials that might prevent adhesive bond.
- Calcium chloride moisture tests (ASTM F1869); results should be 3 pounds or less or resilient flooring manufacturer's recommendations
- RH Probe Test 75% or less or resilient flooring manufacturer's recommendations.
- Alkalinity testing; maximum pH of 9
- Don't use adhesive removers
- Radiant heated floors: surface temperature should not exceed 85 degrees F (29 degrees C)
- Flatness requirements: +3/16" in 10 feet (FF32)
- Drying time for slab: minimum of 60-90 days
- Water/cement ratio: 0.40 to 0.45
- Moisture retarders recommended under all on- and below-grade concrete floors.