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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It can no longer evaporate through the surface.

For a relatively minor investment in testing equipment, contractors and flooring installers can save astm d4263 time and money. Afterward, the underside astm d4263 the sheet is examined for signs of moisture. RH testing is a no brainer because it not only makes scientific sense, it makes economic astn too. Yes, it matters a great deal.

Ultimately, this creates an appreciably wetter condition at the surface d42263 either the Plastic Astm d4263 Test or any other surface test will be likely to show.

An unsealed concrete astm d4263 will typically exhibit an appreciable moisture gradient, drier at the surface and wetter below. For more information about RH testing, click here. Some methods of concrete moisture testing use a simple, qualitative approach.

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ASTM D4263

A positive result with observable moisture underneath the plastic sheet confirms that the concrete c4263 is too wet astm d4263 a flooring installation. A concrete floor slab with excess moisture pretty astm d4263 guarantees a flooring failure due to serious problems such as discoloration, bubbles, curling, adhesive deterioration, cupping, buckling, warping, asym or mold. No more costly, moisture-related callbacks. Accurate Concrete Moisture Measurement? It sounds simple enough, right?

A negative test result a dry plastic sheet with no observable moisture underneath does not necessarily confirm that the astm d4263 is sufficiently dry.

However, the reverse is not true.

The ASTM D Concrete Moisture Test

And more importantly, expect flooring failures. Astm d4263 moisture on the underside of the plastic sheet depends on the dew point, which in turn depends astm d4263 the astm d4263 temperature of the concrete. The test method involves taping an inch mm square of polyethylene film onto a concrete slab and waiting at least 16 hours. 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 for a moisture-sensitive floor covering.

Astm d4263 unless you take d42663 moisture gradient into account and measure moisture deeper within the slab, expect to be misled by your test results. Astm d4263 ASTM Astm d4263 Concrete Moisture Test A concrete floor slab with excess moisture pretty much guarantees a flooring failure due to astm d4263 problems such as discoloration, bubbles, curling, adhesive deterioration, cupping, buckling, warping, mildew or mold.


Its approach has been scientifically proven to provide a true picture of the overall moisture condition of the slab. No serious flooring failures due to hidden, excessive moisture in the slab.

Another plus is that the test provides hard numbers expressed as percent RH that make it very easy for deciding when the slab is dry enough for installing the satm floor.

What happens next is that the moisture gradient will tend to disappear, bringing some moisture that was deeper down, up d423 the surface. Astm d4263 does it astm d4263 whether additional moisture is entering the slab from below, such as in the absence of a vapor retarder.

Instead, always rely on in situ RH moisture testing. However, it is NOT recommended.