Paint with acceptable VOC levels: The EPA (Environmental Protection Agency) reports that most conventional paints and coatings contain Volatile Organic Compounds (VOC's) that can be dangerous to your health. An experienced painting company will be able to advise you on the potential health hazards of these chemicals, which products are safest, and how to best manage any VOC risk that may occur.
Walls should be wet down before getting scrubbed, then washed with a gallon of water mixed with 1 cup chlorine bleach and 1 cup of either a concentrated, phosphate-free cleaner, such as a trisodium phosphate (TSP) substitute, or Jomax House Cleaner. Working in sections, from the bottom to the top, will avoid streaks. Be sure to rinse walls well before the solution dries. Wood siding and trim should be ready to paint after a day or two of dry weather. House Painting