Nova Caine Power Washing and Roof Cleaning of Fairfax virginia. We can do pressure cleaning services, roof cleaning, siding wash, and gutter stain removal in Fairfax county of nova. nova power washing also serves fairfax county burke annandale vienna tysons springfield, all the way to alexandria and washington dc. Power Washing and Pressure Cleaning services is an art form that must be done right to remove mold and mildew growing on siding and roofs. roof cleaning is a necessary step.