How often you should have your house pressure washed really depends on the area you live in. Natural contaminants such as mildew, algae and mold can appear on vinyl, wood, and aluminum siding as well as stucco, dryvit and brick. This situation can be more of a predicament for a home that is shaded by trees; the lack of sun permits moisture to be present helping the pollutants to grow.
Other contaminants that can collect on your home’s exterior are spider webs, bug fecal and bird droppings. Some homes are more prone to these impurities than others.  Receiving a house washing service followed by an insect treatment around the perimeter of your home can really help eradicate the bug contaminants.
Those living in close proximity to a major highway or airport will have exhaust emission pollutants collect on their homes in the appearance of gray or black dust. The positive aspect is all of these contaminants and pollutants can be removed by a professional exterior cleaning company to restore your home’s appearance. Having the exterior of your home cleaned every couple of years, as a regular maintenance program, is a good idea that will help to maintain its value.

How long your vinyl siding will stay free of dirt, mildew and algae after it’s been cleaned highly depends on how well it was cleaned. From our experience in talking with our customers that have cleaned their own homes in the past, the consumer grade cleaners sold at hardware stores do a mediocre job at first but contaminants seem to return in a few short months. The trick to cleaning the exterior of your home and keeping it clean is to use the proper cleaners and methods.
 Professional power washers rely heavily on their house washing cleaners to do the work so they can use low pressure techniques to clean the vinyl siding eradicating risk of damage. The proper house cleaning detergents will not only remove dirt and grime but will kill the roots of any mildew and algae. High pressure will remove these pollutants but without killing them with cleaners they return quickly. Moreover, using high pressure will risk damage to the siding, windows and landscaping. A house cleaning done right will result in a home free of dirt, grime, mildew and algae and can be expected to stay clean for approximately two years.

Using the correct cleaners for cleaning your home whether it is vinyl siding, wood, stucco, or brick is crucial to getting it fully clean. Dirt, grime, spider webs, and bug fecal are a few of the contaminants that can collect on your home’s exterior. These natural pollutants need to be cleaned with special detergents like soap and degreasers or a combination of both. Mold, mildew and algae on the other hand have to be cleaned using bleach based cleaners.

Mild bleach is the only chemical that will kill mold, mildew and algae and remove it for good. Using only detergents and high pressure may remove what you can see of the mold, mildew and algae but it will not kill it down deep, therefore it will return in full force in as little as a few weeks. The best recipe for pressure cleaning your home to free it from all of these pollutants is a good house washing detergent mixed with about a 1% to 2% concentration of bleach.