Chalk run-down

Chalk Run-Down

This occurs when chalk from excessively eroded paint washes down onto another area below it (a brick foundation, for example), ruining its appearance (see Chalking).

POSSIBLE CAUSES

  • Using a lower-quality, highly pigmented paint.
  • Using an interior paint for an outdoor application.

SOLUTION
Remove as much of the chalk residue as possible (see Chalking). Scrub any stained areas with a stiff brush and a detergent solution, then rinse the surface thoroughly. In cases of severe staining, an acid wash may be necessary.

Either way, if the affected area dries to a different colour, consider repainting it with a quality water-based paint.

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