Industrial bleach, or sodium hypochlorite in strong dilutions, will make your surfaces look clean. But the spores will rapidly re-colonise – making your property look as badly stained as before – because the bleach does not kill them to their roots. In addition, repeated high strength use will damage the surfaces of your property, especially concrete and tarmac.
Some soft wash companies only use strong sodium hypochlorite. But we use a hard surface cleaner that contains hypochlorite and which, because of the specialized formulation, when diluted is both safe and highly effective.