A potentially harmful accumulation of water-soluble salts that re-crystalize just beneath a masonry, stucco, or concrete surface as moisture in the wall evaporates leaving the salts behind.

Related resource: RR-1105: Internal Insulation of Masonry Walls: Final Measure Guideline; RR-1202: Byggmeister Test Home—Cold Climate Mulitfamily Masonry Building Condition Assesment and Retrofit Analysis

Variants

sub-efflorescence