Who is responsible for a leak that burst all over a house? a plumber repiped the house a few years ago, and put plumbing pipes against the trusses instead of between the trusses which is where they belong. when we reroofed the house a nail went into the pipe and started the leak. House had been remodeled and the last detail was to put the new roof on. When roofer was shingling one of his nails hit the pipe that was under the plywood. No one was aware that there would be a pipe there. No one was living in the home at the time and noone was aware it happened till the home owner went over to check on things. Who do we put expect to be responsible?