Sluisifer t1_je60tsv wrote
Reply to comment by Moogy_C in Surely this is mold. But on a bleached open concrete area? by Moogy_C
What you see is salt. Water is in the concrete and there is salt dissolved in the water. When the water evaporates on the surface of the concrete, salt crystals remain.
More ventilation just means that the drying happens faster, but does not change the amount of water and salt that is in the concrete. So no, ventilation does not help. You need to prevent moisture from getting into the concrete in the first place. This may mean fixing leaks, grading around the foundation, sealing, etc.
Moogy_C OP t1_je61p14 wrote
Great answer, thank you very much.
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