Power washing or pressure washing is a very general term used for washing using "power washer machines". In reality, even when your contractor is using power washing equipment, the process used will differ greatly depending on the type of surfaced to be cleaned and its condition. For example, Ocean and Monmouth County NJ have many commercial structures built with an EIFS or stucco façade...and these surfaces cannot be washed with pressurized water. The preferred way to clean this surface is with an application of an appropriate detergent followed by a soft low pressure rinse.
Brick and concrete on the other hand, due to its porosity, will need a high pressure wash to remove the dirt and mold. Vinyl and aluminum siding can take more pressure than stucco, but not quite as much as masonry.
We hear a lot about power washers, and today many homeowners can purchase one at their local hardware store. Its important to know that power washing equipment, especially the larger commercial ones can be dangerous and cause harm to both people and property.
If your commercial or multifamily property is in need of a power wash, be certain that your contractor has experience working on similar types of properties. The structures on your property may have different types of surfaces that require different processes for optimal cleaning. Damage to a surface such as stucco or concrete from using too much water pressure or the wrong type of chemicals usually cannot be reversed. An experienced contractor will explain to you their process and how thay will safely make your property shine.