Profile: Contract Services Group, Inc. offers window cleaning and janitorial services. We specialize in design, fabrication and installation of window washing systems. Pressure washing is a method of cleaning using a stream or spray of highly pressurized water across the surface being cleaned. It is a solution for cleaning hard surfaces that take a lot of abuse from weather, oil, dirt and mold or mildew. We offer pressure washing services for high rise building exteriors, parking structures, sidewalks, floor scrubbing, dumpster cleanings and for trash chute cleaning.