What is ISO 12571 about?
ISO 12571 specifies two alternative methods for determining hygroscopic sorption properties of porous building materials and products:
Using desiccators and weighing cups (desiccator method);
Using a climatic chamber (climatic chamber method).
The desiccator method is the reference method.
The methods specified in ISO 12571 can be used to determine the moisture content of a sample in equilibrium with air at a specific temperature and humidity.
NOTE: This document does not specify the method for sampling.
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BS EN ISO 12571:2021 history
2021BS EN ISO 12571:2021 Hygrothermal performance of building materials and products. Determination of hygroscopic sorption properties
2013BS EN ISO 12571:2013 Hygrothermal performance of building materials and products. Determination of hygroscopic sorption properties