Exposed Aggregate Driveway in Richmond VA. Where do I start with this one. This finish is very popular, beautiful and also vilified. The vilification is generally because of neglect. You see, while this surface does not look like it, it is very porous. Let me explain a little bit. When we install exposed aggregate we rinse off the top layer of cement in order to “expose the stone”. The finish product leaves you with little stones surrounded by cement. There is a fine edge here, because we are rinsing away the material that holds the stone in place. Around each stone is cement which is generally a tad lower then the top of the stone. Thereby forming a pocket. This gives a place for water, ice, salt, acid rain etc… to sit. These environmental issues can cause your stones to delaminate or the cement to get week that surround each individual stone. What you get if it is not maintained is the loosening or depletion of the stone. If you have this issue and want some advice please give us a call, I will be glad to help.