On a cool, cloudy day:
Apply a solution of ½ cup TSP, 1 quart household bleach and 3 quarts of water to affected areas.
Agitate with a scrub brush.
Let stand on the surface for at least 45 minutes.
Rinse off with a garden hose.
Allow surface to dry completely.
Top coat with mildew-resistant paint.
Design by Quasar Design & Data Management Inc.