Pressure Washing Retaining Walls: Safe PSI and Costs
Pressure washing retaining walls removes soil film, algae, mold, lichen, efflorescence, and some stains when the wall is structurally sound and the pressure matches its material. Start with a low-pressure test area, use detergent for organic growth, keep the nozzle moving, and never wash a bowing wall, loose mortar, or exposed drainage system aggressively. Key […]