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Close up image of a surface that resembles mildew growing because of dirt, dust particles accumulating on the paint film.

Causes

  • Use of a low-quality paint.
  • Soil splashing onto siding.
  • Air pollution, car exhaust and flying dust collecting on house body and horizontal trim.

Solutions

  • Text BoxWash off all surface dirt before priming and painting. If unsure whether the problem is dirt or mildew, conduct a simple spot-test (see Mildew). Clean off dirt with a scrub brush and detergent solution, followed by thorough rinsing with a garden hose. Heavier dirt accumulations may require careful power washing. Dirt may be permanently embedded in the paint.
  • While dirt pickup can’t be eliminated entirely, high-quality exterior latex paints typically offer superior dirt pick-up resistance. Also, higher gloss paints are more resistant to dirt pickup than flat paints, which are more porous and can more easily entrap dirt.

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What Product Do I Need?
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What Sheen Do I Need?
8 Oz. Sample
1 Gallon
1 Quart
5 Gallon
The following product(s) is required to properly prep uncoated and previously coated concrete surfaces.
Required product
BEHR PREMIUM ALL-IN-ONE WOOD CCCC
$0.00
The following product(s) is required to properly prep uncoated and previously coated concrete surfaces. Only available in store at Home Depot.
Required 3rd party product
BEHR PREMIUM ALL-IN-ONE WOOD CCCC
The 9 in. x 1/4 in. Polyester Adhesive Roller Cover has a hard texture, making it ideal for applying all types of adhesives to smooth surfaces. It can be used for stippling and applying sand paints.
The following product(s) is recommended when a topcoat clear finish is desired.
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