Calcium Chloride Test Kits

These Calcium Chloride Moisture Test Kits should be used by all homeowners and contractors before painting or coating concrete floors, installing tiles, carpeting, linoleum, engineered hardwood or solid wood flooring, be it a basement floor, slab-on-grade, garage floor, or a patio.

Concrete is porous and water vapor coming up from a concrete floor and the ground below gets trapped under any coating or floor covering. This may crack paint, delaminate epoxy coatings, break down tile adhesives, buckle wood floors, activate efflorescence in the concrete, and cause molds and mildew under linoleum or plastic sheets. The resulting damages may be in $1,000s.

Vapor Emission Test Kits provide inexpensive prevention. They measure the amount of water vapor emitted from concrete floors, i.e. the Moisture Vapor Emission Rate (MVER). Flooring manufacturers set the maximum allowed MVER, usually in the range of 3 to 5 lbs/1,000 sq. ft. in 24 hours or their warranty becomes void.

The anhydrous calcium chloride moisture test method has become an industry standard. Just place the calcium chloride test dish on the concrete floor and cover it with an airtight plastic dome. The test dish absorbs moisture coming up from the concrete. You then weigh the test dish on a high-precision gram scale (sold separately) and from the weight gain of the dish calculate the Moisture Vapor Emission Rate in pounds per 1,000 sq. ft. in 24 hours.

ASTM and flooring manufacturers also require that a pH test be performed along with every vapor transmission test. Each kit includes an alkalinity pH test kit. Concrete is alkaline and the alkali may attack paints, stains, coatings, and floor coverings.

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