Though household bleach can be used to remove mildew, commercially prepared washes both kill mildew and cause mildew and dirt to release from the surface with little or no scrubbing. However, rough-sawn wood and stucco may need aggressive scrubbing to ensure complete cleaning. Never mix bleach with ammonia or any detergents or cleaners containing ammonia, however. Bleach and ammonia in combination can be lethal. People have actually died from breathing the fumes from such a mixture.
Many household cleaners contain ammonia.
Once you have removed the mildew and dirt from your home, you may decide that it looks good enough to forgo a paint job this year. But if a paint job is still in order, visit your local paint store for products and advice. Click here to receive up to four Free estimates from prescreened and insured contractors. Easily Become a Master Gardener with Pre-Designed Gardens. FREE Issue of The Family Handyman Magazine.