Chestertown Maryland Roof Cleaning. This 4500 square foot home in beautiful Chestertown had been built about 15 years ago. The Beautiful siding and roof were dirty and needed to be cleaned. The stucco siding was clean using a low pressure pump, rated only 100 PSI. Thus no paint or trim was damaged in the cleaning process, so no repainting was needed. That alone saved the homeowners a large headache. The roof was cleaned using our shingle manufacturer recommended detergent. It too was applied with a soft wash pump, and it kill the algae on contact. This entire wash service made the home look almost like new. The gutters were also cleaned out.