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Mildew On Siding - Weatherproof Siding

The combination of a heat and moisture can cause wood to mildew, which can permanently stain wood surfaces as well as soften them as the mildew will keep the surface damp longer.

Remove Mildew Stains and Slow Mildew Growth
To help remove stains and slow mildew growth, wash your siding with this mixture:

- 3 gallons water
- 1/3 cup mild liquid detergent (such as dishwashing soap)
- 1 quart liquid bleach

Combine mixture in a bucket and wash siding with a stiff push broom or other brush. Make sure to wear protective gear to protect skin, eyes and clothes. After cleaning, rinse thoroughly with a hose.

Hammer Is your mildew particularly persistant? Talk to other DIYers in our Siding forum and ask questions!