Water stains, moss and dirt can ruin the look of an exterior concrete wall. Whether the wall is part of a building or a part of the landscape design, keeping it clean can improve the entire appearance of your property. The permeable surface of concrete absorbs staining agents, so water and scrubbing alone won’t work all the dirt out of the porous concrete. A thorough cleaning with a concrete-safe cleanser and our machine will remove them completely and have your walls looking brand new again.