Pittsburgh's premier pressure washing company, serving both commercial and residential clients. Let our professionals clean your buildings, walkways, machinery, graffiti or stain removal. Keystone Pressure Washing and Roof Cleaning uses only the best methods available and state of the art equipment to clean the even the most delicate surfaces. We are skilled in the removal of mold, mildew and algae, a big problem for the residents of Pittsburgh and the surrounding tri-state area. Let us rid you of these problems with the utmost care in mind. Give us a call today!