Moisture Test Kits for Concrete
These Calcium Chloride Moisture Test Kits should be used by all homeowners and contractors before painting, coating, installing tiles, carpeting, linoleum, engineered hardwood or solid wood flooring on concrete floors, be it a basement floor, garage floor, slab-on-grade, or a patio.
Concrete is porous and water vapor coming up from concrete floors and the ground below gets trapped under any coating or covering. This may crack paint, delaminate epoxy coatings, break down tile adhesives, buckle wood floors, activate efflorescence inside 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 Moisture Vapor Emission Rate (MVER) – the amount of water vapor emitted from concrete floors.
The calcium chloride moisture test method has become an industry standard. A calcium chloride test dish is placed on the floor under an airtight plastic dome where it absorbs moisture coming up from the concrete. The gain in its weight is measured on a high-precision gram scale (sold separately). The moisture vapor emission rate in pounds per 1,000 sq. ft. in 24 hours is calculated from the weight gain of the test dish. 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.
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.
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