I think if the best you can say about your friend is that you have a civil relationship, and you are out of pocket because of her husband's work then I think you should make a formal complaint and apply for compensation. I agree with the others in that the chance of him having acted in ignorance are pretty slim. We have the Builders Registration Board here where you take complaints - I'm guessing there is something similar in your state. If what he has done on your house isn't up to spec then you may have issues if you want to sell your house down the track, so its worth getting it sorted out properly now - and not at your expense!