Causes

• Because of the high humidity on the concrete wall, the paint blisters and peels off. This might be due to water leaking in various portions of the structure or a high moisture absorption from water uptake example Lower wall area.
• The reason for this is because the surface before painting contains dirt, dust, and grease stains or inadequate surface cleaning, or has used the incorrect primer pain.
• The paint coating has deteriorated with service life.