About Pressure Washers for Render Cleaning
Best practice is low-pressure soft wash with biocide rather than blasting. Use a 100–130 bar washer with a wide fan, paired with a render-safe cleaner (Wash-IT, Wet & Forget).
Top picks: Kärcher K4/K5 with telescopic lance, Nilfisk Core 140 Pro, and Karcher SC4 soft-wash system. Avoid turbo nozzles which can erode older renders.
Always pre-wet the wall, work top-down, and treat algae stains chemically rather than mechanically for best long-term results.