Water in the soil is constantly trying to get into your basement.
Concrete basement walls flaking.
Concrete is porous and it absorbs moisture a tiny like a sponge.
The reason you don t see more moisture is that it is evaporating as it reaches the surface and when it evaporated it leaves behind those minerals.
You can ensure this never happens when you build a home by spraying a rubberized asphalt waterproofing compound on the new foundation.
The efflorescence is telling the story it is not created by condensation but by moisture vapor or liquid water passing through the concrete and it doesn t look like a slight condition.
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If you try to seal the interior surface of the concrete and it still remains wet and the sealer will either flake off or cause even more damage to the wall.
Moisture and often salt too push outward from the inside in basements especially.
Although the interior was probably.
Spalling happens in concrete because of moisture in the concrete.
It s also known as flaking especially in limestone.
The flaking is caused by this moisture vapor pressure that s actively trying to gain entrance to your nice dry space.
This builds up on concrete surfaces in basements and in crawl spaces regularly occurring as part of the process of moisture coming from the earth passing via the concrete and evaporating into your basement.
It forces the surface to peel pop out or flake off.
You have blistering because moisture in the concrete is causing the paint to lose adhesion.
This is caused by excess moisture moving through your concrete basement walls.
Efflor escence is a crystalline or powdery salt deposit that forms when water is present on masonry.
The real solution is to stop the water.