Storefronts and building get all kinds of carbons, mold, airborne pollutants and dirt caught in the mortar joints. There are several ways to approach this and get effective results. There are also ways which can harm or deteriorate the joints.
If you let this go over a period of time the stains become tougher and tougher to remove which could become costly
We use an environmentally safe (GREEN) solution to clean these areas. The products are sprayed on the affected areas. We then rinse the area off and clear off the sidewalk.
The result is a great looking store with no ill effects to the environment!