In most cases we often mix the two methods of cleaning, using high pressure washing to clean the majority of the dirt from a surface followed by a chemical soft wash to kill organics or to lift stains etc. However soft washing will often be chosen as the sole method of cleaning, this is usually in the case where surfaces are fragile by nature, age or weathered, pressure sensitive or there is a reason for why the use of a pressure washer is restricted. The ideal surfaces for soft washing would be brickwork, render, limestone, canopies made of fabric like materials and many more.