Concrete cleaning On for large restaurants in middle Tennessee we did a pre-treat on all concrete and dumpster pads we let this dwell for 30 to 45 minutes then we soft washed the building and awnings put a lot of treatment on the awnings and clean them by hand.I note it is very important to know what type of material these are. Then we put the surface cleaner with 140° hot water on all concrete surfaces this gives you a deep cleaning and makes dirty grimy looking concrete in some cases look brand new. MidTen Power Washing pros Pride their selves on the work that we do we give our employees extensive training every year to keep up with this industry it's not just spraying water is taking the old and making it look new that is why We love it! give Mark a call at 855-230-3916 to look at your project we do commercial as well as residential no job too big no job too small.