Increasing Water Absorptivity of an Aerogel-Based Coating Mortar in Subsequent Wetting and Drying.

Aerogel-based coating mortars are energy-efficient composites with thermal conductivities of 30-50 mW/(m·K). They are useful when retrofitting uninsulated building envelopes, particularly in listed masonry buildings, as shown in studies. Meanwhile, the long-term reliability of their hygrothermal properties, typically declared after a single laboratory measurement, is not confirmed.