Concrete is porous and will certainly attract a variety of difficult stains over time, (rust, mold, dirt, grease, oil and the list goes on). Exceptional Exteriors uses both hot pressure washers and cold pressure washers along with cleaning detergents and which one we use depends on the nature of the stain. Some light mold or dirt might only require a cold water machine while other heavily stained areas would need hot water. We'll also use a surface cleaner as this helps avoid wand marks that happen when using as standard gun with a back and forth motion. Whether the job is a large commercial parking lot, residential patio or driveway, Exceptional Exteriors has the equipment and knowledge and commitment to get the job done right.