Black staining is usually caused by algae, mold, mildew, embedded dirt, vehicle traffic, and years of accumulated organic buildup. in Westminster, CO
Because concrete is porous, contaminants work their way below the surface over time. Routine pressure washing helps remove this buildup before it becomes more difficult to clean.
💡 Good to Know
A driveway that's cleaned regularly is often easier to maintain than one that's neglected for many years.
