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Exterior Paint Problem Solver
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Dirt Pickup
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Accumulation of dirt, dust particles and/or other debris on the paint film; may resemble mildew.
Possible Cause:
Use of a lower quality paint, especially lower grades of satin or semi-gloss.
Soil splashing onto siding.
Air pollution, car exhaust and flying dust collecting on house body and horizontal trim.
Solution:
Wash off all surface dirt before priming and painting.
To identify 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 a thorough rinsing with a garden hose. Heavier dirt accumulations may require the use of a power washer.
While dirt pickup cannot be eliminated entirely, a high quality latex house paint offers superior dirt pickup resistance and washability.
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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