Summer Exterior Cleaning in South Carolina

The Midlands runs 90-95°F with 70-80% relative humidity from June through September. Those are near-ideal conditions for black algae, green mold, and mildew to establish on every exterior surface. North-facing walls that never fully dry are the worst. Shaded driveways and patios see green algae creep in from the edges. Vinyl siding develops the dark streaks that many homeowners mistake for dirt but are actually colonies of Gloeocapsa magma algae.

House siding is the highest priority because biological growth on siding is not just cosmetic — it holds moisture against the substrate, which accelerates deterioration of paint, caulk, and in some cases the siding material itself. Decks develop a slippery biofilm that is a slip hazard by July. Driveways and patios with partial shade green up fast and need attention by mid-summer. Fences often show heavy mildew on the shaded side that is invisible from the street.

High-pressure water blasts visible dirt and loose growth but does not kill the organisms causing it. Within weeks, mold and algae regrow from spores left behind. Soft washing uses low pressure with a sodium hypochlorite or biodegradable surfactant solution that kills the organisms at the surface and into pores. Results last 2-3 times longer than pressure washing alone. We use soft wash on all siding, wood, and painted surfaces. Concrete gets pressure washing with a downstream soap application for the best results.

Summer slots fill up from June onward. The most efficient approach for properties needing multiple services is to schedule a combined visit — house soft wash, driveway, and gutter flush in a single morning. We serve Lexington, West Columbia, Columbia, Irmo, and 21 other communities across the metro. Mornings are cooler and surfaces dry faster when the sun hits them mid-day, so we prefer early start times in summer. Call (839) 250-1959 to schedule.