In the fight on exterior grime, the three biggest offenders are mold, mildew and algae. These culprits not only make your home's exterior look run down but they also present health risk such as asthmatic and allergic reactions. Mold spores outside can easily enter your home through windows, cracks and improperly installed siding.
Did you know that the manufacturers of vinyl siding suggest you have your house washed every two years to avoid the unsightly build up of oxidation.