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Regular problem mildew

Definition

Mildew is a fungus (mold) that grows on many exterior painted surfaces, as well as on interior bathroom walls and other humid or poorly ventilated interior areas. If not corrected, mildew will continue eating the existing paint away, causing eventual paint failure in the affected areas. There is no way to absolutely prevent mildew growth, however, it maybe controlled if the proper precautions and recommendations are followed.

Causes

  • Failure to prime a bare wood surface before applying the paint
  • Painting over a surface previously infected with mildew
  • Excess humidity or other moisture problems

Solutions

  • First, to determine if the problem is mildew, apply a few drops of bleach to the surface. If the dark color bleaches out in a few minutes, it is likely mildew, as dirt or other contamination would not be affected.
  • Locate and correct any sources of moisture accumulation or excess humidity.
  • Protect all plants and shrubs with dropcloths before cleaning the surface.
  • Clean the surface with a commercially prepared mildew remover or use a homemade solution of one quart liquid chlorine bleach, three quarts warm water and 1/4 cup ammonia-free liquid dishwasher detergent.
  • Rinse the surface and surroundings thoroughly with clean water.
  • Allow the surface to dry completely before painting.
  • Use an appropriate primer and then apply a high-quality paint in the desired finish.

Caution

Chlorine bleach must never be mixed with ammonia or with any detergent or cleaners containing ammonia. These mixtures will form vapors that can be harmful or even lethal. Gloves, goggles and protective clothing should be worn for protection.

Notes

Dunn-Edwards uses mildewcides in all exterior paints to resist new mildew growth. In addition, a fungicide or mildewcide may be added to the primer and paint if extra protection is desired.


Product Recommendations

Interior

Desired Finish Recommended Product
Flat SUPREMA® Interior Flat Paint
Velvet SUPREMA® Interior Velvet Paint
Eggshell SUPREMA® Interior Eggshell Paint
Low Sheen SUPREMA® Interior Low Sheen Paint
Semi-Gloss SUPREMA® Interior Semi-Gloss Paint

Exterior

Desired Finish Recommended Product
Flat EVERSHIELD® Exterior Flat Paint
Velvet EVERSHIELD® Exterior Velvet Paint
Eggshell EVERSHIELD® Exterior Eggshell Paint
Low Sheen EVERSHIELD® Exterior Low Sheen Paint
Semi-Gloss EVERSHIELD® Exterior Semi-Gloss Paint
Gloss EVERSHIELD® Exterior Gloss Paint

Low Odor|Zero VOC Interior

Desired Finish Recommended Product
Flat EVEREST® Interior Flat Paint
Eggshell EVEREST® Interior Eggshell Paint
Semi-Gloss EVEREST® Interior Semi-Gloss Paint

Please note that these suggestions are provided as a service to you. We are unable to guarantee or be responsible for the results obtained by these procedures. If you have additional questions, ask any of our expert sales associates.