Over time, driveways, patios, decks, and fences collect layers of dirt, algae, mildew, and weathered grime that routine rain will not shift. Professional power washing removes that buildup using pressurized water calibrated to each surface type, restoring your property to a cleaner, more attractive condition and protecting hard surfaces from the long-term damage that biological growth causes when left unchecked.
What Is Power Washing?
Power washing uses a motorized pump to force water through a high-pressure nozzle, delivering far greater cleaning force than a standard garden hose. Technicians control output in PSI (pounds per square inch), dialing pressure up or down to match the material being cleaned. Concrete and brick can tolerate higher pressure. Wood decking, vinyl fencing, and composite surfaces require lower settings to avoid surface damage. When applied correctly, power washing strips away contaminants that make surfaces look aged and worn, often restoring their original appearance in a single service.
What Surfaces Do We Power Wash?
Our team handles a wide range of hard exterior surfaces throughout St. Louis County. Driveways and sidewalks accumulate oil stains, tire marks, and embedded dirt that pressure washing removes efficiently. Decks and patios collect algae and mildew in Missouri's humid summers, leaving surfaces slippery and discolored. Wood and vinyl fences, retaining walls, pool decks, and garage floors all benefit from periodic washing to remove the biological growth and weathering that occur through normal seasonal exposure. We work around landscaping, outdoor fixtures, and vehicles, leaving every surface clean without damaging adjacent materials.
Why Does St. Louis County Grime Build Up So Quickly?
Missouri's climate creates near-ideal conditions for biological growth on exterior surfaces. Spring brings heavy pollen that coats every horizontal surface. Summer humidity encourages algae and mildew to establish themselves on concrete, brick, and wood. Seasonal storms deposit organic material from trees and landscaping. Winter road salt and freeze-thaw cycles stress concrete and leave mineral staining that accumulates season after season. By late spring, most driveways, sidewalks, and patios in St. Louis County carry a full season's worth of buildup that requires professional cleaning to address properly.
When Is the Right Time to Power Wash?
Most homeowners in St. Louis County benefit from power washing once a year, typically in late spring after pollen season or in early fall before temperatures drop. Spring cleaning removes winter accumulation and prepares surfaces for outdoor use. Fall washing removes summer biological growth before a winter season embeds it further. Properties near trees, in shaded areas, or with significant vehicle traffic may need attention more frequently. Commercial properties and homes preparing for sale often schedule power washing on a different timeline based on their specific needs.
Why Choose Andy's Window Cleaning?
Andy's Window Cleaning has served St. Louis County and surrounding communities for years, earning recognition as Missouri's Best Window Cleaning Company in 2023, 2024, and 2025 by Missouri Best Magazine. Our team brings professional equipment and surface-specific knowledge to every power washing job. We assess each surface before applying pressure, protect nearby plants and fixtures, and rinse thoroughly so no residue remains. Our commitment is straightforward: Done Right, or We Make It Right. Request a free quote and we will assess your driveway, deck, patio, or fence and provide an exact cost before scheduling.