How to Remove and Clean Mildew From Exterior Walls and Siding?

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Mildew is not a nice sight, but it is simple to remove and clean. If you see mildew on the exterior walls and siding, here are some steps you can take to help remove and prevent further mildew growth.

How Do I Stop Mildew Growth On My House?

Mildew is the result of moisture and humidity. By ensuring the exterior has good airflow, so it dries quickly, you can control the growth of mildew. The following are some ways to prevent future growth:

Do not place shrubs against walls.

Position landscaping to allow air to flow on the house, drying it after rain or dew.

Watch areas on the northern side for added airflow as sunlight is unable to help in drying.

Install moderate roof overhangs, gutters, and downspouts.

Using water-repellent finish on wood siding.

On siding known for absorbing moisture, use a primer and oil, gloss latex, or semi-gloss paint.

Tips To Remove Mildew From Stucco, Hardi-plan, or Wood Siding

  • 1-quartfresh chlorine bleach
  • 1/3 cup laundry detergent
  • 3 quarts lukewarm water
  • The alkaline cleaner contains trisodium phosphate for additional cleaning strength. Use ½ to 2/3 cup or as directed.

Using a soft brush, scrub the surface of your exterior walls or siding. Avoid getting it on plants or shrubs, and rinse after scrubbing.

You may prefer a commercial mildew cleaner; either way, always wear protective gear: goggles, long sleeves, and rubber gloves.

Repainting After Mildew Removal

When repainting the siding after removing mildew, choose a mildew-resistant paint. Try to avoid latex paints as they are the most susceptible to mildew. Less susceptible options are acrylic gloss or semi-gloss, but the best are exterior enamels or specialty paints that include mildewcide.

If you’re unsure which paint to choose, the paint supplier can help you select the best paint and primer for reducing mildew.

Removing Mildew From Brick Walls

Spray the bricks down using a spray nozzle on your water hose each year. Then, using a stiff brush apply a solution of 1 cup bleach and 1 gallon of water.

Avoid synthetic or wire brushes as they can leave brick discolored. Natural fiber brushes are the best option; then let the brick soak with the solution before spraying it off.

Removing Mildew From Stone Walls

Use a mild soap mix to clean fences, stone walls, and other surfaces.

Conclusion

While homeowners never like seeing mildew, it is simple to remove. If you want to reduce chances of future growth,clean the surface each year, and keep plenty of airflow between plants and your walls.

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