Painepesua

Painepesua, Finnish for pressure washing, is a cleaning method that uses a high-pressure jet of water to remove dirt, mold, algae, and other contaminants from surfaces. It is commonly applied to building exteriors, driveways, decks, vehicles, and industrial equipment, and may be used with detergents.

A pressure washer pressurizes water supplied from a tap. Home machines typically deliver 1000–2000 psi at 1–2 gpm; professional units reach 3000 psi or more. Operators choose nozzle tips (for example 15° or 25°) and may attach surface cleaners for wide areas. Cold water suffices for most tasks; hot-water models help on oils. Soft washing uses low pressure with cleaners for delicate surfaces.

Applications include cleaning siding, concrete, fences, patios, driveways, graffiti removal, and industrial equipment. It can remove paint, moss, gum, and buildup, but high pressure can damage wood, paint, or glass, so selection of pressure and technique matters.

Safety and environmental considerations are important. High-pressure sprays can injure and damage surfaces; operators wear eye protection, gloves, and sturdy footwear. Detergents and wash water require proper disposal to prevent pollution; avoid plants and electrical hazards; follow local regulations.

In Finland, painepesua is a common maintenance service offered by cleaning companies and municipal services. Its effectiveness depends on surface type, equipment, and operator skill.