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Slab Moisture Testing: Is it always reliable?
Eric H. Lidholm Concrete Construction, June, 1996"Slab moisture-emission testing is commonly required before contractors can install an impermeable floor topping on concrete slabs on grade. Several tests are available to define whether an excessive slab-moisture condition exists, which can cause debonding of the topping. As the following case history illustrates, however, a slab can pass moisture-emission tests yet still contain too much moisture for adequate performance of an impermeable topping."