Pressure washing costs in Louisville

Louisville Water has a warning for anyone who clips a pressure washing attachment or a window-washing solution onto a garden hose. If the pressure in your house drops, because too many appliances are running or a water main breaks, the water in the hose and whatever is hooked to it can run backward into your drinking water. In 2018 the utility's cross-connection expert said the fix is a hose bib vacuum breaker screwed onto the outdoor faucet. Home centers carry them.

Older brick gets a light touch in the city's landmarks and preservation districts. Design guidelines adopted there in May 2024 name freeze-thaw cycles and de-icing salts among the things that make brick crack and crumble. They say to clean masonry only when heavy soiling is causing damage, with low-pressure water and natural bristle brushes, never high-pressure water or sandblasting. They also rule out water-blasting as a way to strip worn paint from a historic house.

MSD's regulations cover storm sewers across Jefferson County. Wash water from cleaning a building's exterior, gutters included, is on its short list of allowed flows, as long as it poses no environmental or health threat. Commercial wash water from cleaning vehicles or equipment isn't.

When you finish, Louisville Water says to close the outdoor faucet itself rather than stopping the flow at the sprayer head, so the water left in the hose can't slip back if pressure drops.