That yellow Upstate pollen and the green film creeping across your concrete are connected. Here is why driveways go green and how to fix it.
Every spring the Upstate turns yellow as pine and oak pollen coat everything in sight. A few months later homeowners in Greer, Simpsonville, and Mauldin notice something else: a green film spreading across the shaded parts of their driveway and walkways. The two are connected.
Pollen and organic dust settle into the pores of concrete and, in the humid Upstate summer, become food for algae. On shaded, north-facing, or tree-covered slabs that stay damp, that algae spreads into the slick green (and eventually black) film that makes concrete look dingy and gets dangerously slippery when wet.
Rinsing spreads the algae around and pushes it into the pores. Lifting it out takes a surface cleaner and the right pressure for concrete - enough to pull the growth and grime out evenly, without the wand marks and etching that come from a narrow tip. A proper driveway and concrete cleaning leaves the slab even and clean.
Because the cleaning removes the algae rather than just wetting it, results last, especially if you clear leaf litter from shaded areas. Homes in Greer and the surrounding towns see the biggest difference cleaning in late spring, once pollen season winds down. Ask for an upfront quote.
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