High pressure washer loosen ...

It seems that domestic high pressure washer are these days as common as lawnmower. It is so easy to blast dirt and grime on all kind of surfaces with one of these high pressure washer as compared to brushing with elbow grease. When we redeemed a unit from points from our credit card our neighbour was telling us that a friend of his was using one of these washer to clean dirt and grime along mortar joints and that the pressure was so great that it removed grouting and cement along these joints. Some much so that he now have loose tiles!