It's just pressure washing, plain and simple. We use lightweight kit with a rated pressure of 175bar / 2500 psi so there's plenty of power but not so much as to risk damage to the surface. First we remove as many weeds as possible with a grubber, sweep the patio down and get to work with the wash. Outdoor areas suffer wear and tear and some stains will remain but it will look a whole lot better than before. Contact us