ICRI CSMT Practice Questions - ICRI Certified Concrete Slab Moisture Testing Technician Exam

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Many flooring adhesive manufacturers and flooring industry standards cite 75% relative humidity as the maximum allowable in-situ RH level for installing resilient flooring over concrete. If a slab tests at 78% RH, the correct course of action is to:

Delay installation and allow additional drying time or apply a vapor mitigation system before installing flooring Proceed with installation since 78% is close enough to the 75% threshold Increase HVAC airflow over the slab surface for 24 hours, then immediately re-test and install Apply flooring adhesive and install immediately because adhesive tolerances absorb minor variance

Correct Answer:

Delay installation and allow additional drying time or apply a vapor mitigation system before installing flooring

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