When it comes to working on your garden or home it is important to use quality tradesman and if possible use local tradesman. Helping to support your local community is always a good thing also you can save money compared to hiring an out of area tradesman who could be adding on travel time and costs to your quote.
Find Tradesman in online directories, your local paper, and through recomondations from family and friends. These are the best ways of finding reputable tradesman.
However if you cant ask anyone in your family or friends then you need to use a directory that has trusted people on it.
Doing any sort of work with rocks is trickly. There can be rocks that degrade over the years or if they are not set together properly then they can fall away and that can be a big problem. Most tradesmen across the world have the law stating to them that they must have insurance to protect the people that employ them. It is a question you should ask every tradesman that you get to do any work for you.
Have you got insurance?
How much is it?
Will if cover my job if something goes wrong?
Always ask for a copy of that insurance as well.