How to Write A Good Concrete Moisture Testing Specification EP Floors Corp.

Type of testing to be done: ASTM F 1869 moisture test ASTM F 2170 moisture test Add pH testing per ASTM F 710 if indicated.

Number of tests The standard calls for three tests for the first 1,000 sq feet and one test for each 1,000 sq feet thereafter. However, this number may change, depending on the size of the slab, age of concrete, building temperature and RH, and the preliminary results from the Static Moisture Testing.

Timing of testing: The temperature and humidity conditions are important for the dynamic test (Calcium Chloride). For new construction, dynamic testing should be done after the building is enclosed and the HVAC system is running, and the areas have reached steady state conditions.

Reporting: Test reports should contain the conditions at the time of testing, methodology of testing and test results. This is an important way to document not only the test results but the accuracy of the testing that was done. The specification should also identify who is to receive the report – the owner, general contractor, architect or all parties.

Mapping: The more sophisticated reporting done will show a floor plan with the test results, which can help the construction team identify problem areas in the floor.

Repair options: The report should include options for repairing a floor that exceeds the manufacturer’s limits.

The moisture testing specification may be standalone specification as part of a concrete floor slab section that details some of the key points of a concrete industry standard designed to prevent floor covering moisture problems. The details may include the need for: The concrete to be dry, clean, smooth, and free of contamination. Concrete should be moist cured for at least seven days (failure to do so may increase permeability four times or more) The installation of a vapor retarder directly under slabs on or below grade. The use of moisture-retaining coverings for curing concrete. Moisture Testing Specification

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