My home was built in 1938 with a 1960 addition on the back. Recently the water bills have been increasing and I suspect a water leak. Unfortunately, the crawl space under the 1930s part of the house is only about a foot, where all the old galvanized water pipes are. The 1960 addition is on a concrete slab. My plumber is suggesting to repipe the entire house from the attic and down the interior walls. The kitchen and laundry room offer the greatest challenge as the walls are double brick. There is an opening under the dishwasher from a previous water leak repair. My plumber thinks we should cut out a trough in the outside brick, put the pipes in there and cover over, which would be an obvious patch job. Any ideas?