ASTM D , Standard Test. Method for Indicating Moisture in. Concrete by the Plastic Sheet. Method. General Guidance. ASTM E , F ACI R ASTM Dpdf – Download as PDF File .pdf) or read online. 1 Sep This standard is issued under the fixed designation D ; the 1 This test method is under the jurisdiction of ASTM Committee D33 on.

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For more information about RH testing, click here. Instead, always rely on in situ RH astm d4263 testing. The test method involves taping an inch mm square of polyethylene film onto a concrete slab and waiting at astm d4263 16 hours.

Nor does it astm d4263 whether additional moisture is entering the slab from below, such as in the absence of a vapor retarder. So unless you take the moisture gradient into account and astm d4263 moisture deeper within the slab, asfm to be misled by your test results.

However, it is NOT recommended. The ASTM D Concrete Moisture Test A concrete floor slab with excess moisture pretty much guarantees a flooring failure due to serious problems such as discoloration, bubbles, curling, adhesive deterioration, cupping, buckling, warping, mildew or mold.

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Astm d4263 unsealed concrete slab will typically exhibit an appreciable moisture gradient, drier at the astm d4263 and wetter below. Afterward, the underside of the sheet is examined for signs of moisture.

Accurate Concrete Moisture Measurement? It can no longer evaporate through the surface. Astm d4263 more costly, moisture-related callbacks. Its approach has been scientifically proven to provide a true picture of the overall moisture condition of the slab.

ASTM D4263

Another plus is that the test provides hard numbers expressed as percent RH that make it very easy for deciding e4263 the slab is dry enough for installing the finished floor. A concrete floor slab with excess moisture pretty much guarantees a flooring failure due astm d4263 serious problems such as discoloration, bubbles, curling, astm d4263 deterioration, cupping, buckling, warping, mildew or mold.

A negative test result astm d4263 dry plastic sheet with no observable moisture underneath does not necessarily confirm that the slab is sufficiently dry. Yes, it matters a great deal.

Ultimately, this creates astm d4263 appreciably wetter condition at the surface than either the Plastic Sheet Test or any other surface test ashm be likely to show. What astm d4263 next is that the moisture gradient will tend to disappear, bringing some moisture that was deeper down, up toward the surface.


It sounds simple enough, right? Observable moisture on the underside of the plastic sheet depends on the dew ast, which in turn astm d4263 on the surface astm d4263 of the concrete. And more importantly, expect flooring failures.

Some methods of concrete moisture testing use a simple, qualitative approach.

The ASTM D Concrete Moisture Test

For a relatively minor investment in testing equipment, contractors and flooring installers can save considerable time and money. RH testing is a no brainer astm d4263 it not only makes scientific astm d4263, it makes economic sense too. However, the reverse is not true. No serious flooring failures due to hidden, excessive moisture in the slab. Any moisture condensation or observable darkening of the color of the concrete underneath the sheet suggests excessive moisture and means the slab is not ready astm d4263 a moisture-sensitive floor covering.

A positive result with observable moisture underneath the plastic sheet confirms that the concrete slab is too wet for a flooring installation.