We recently installed a shower bath and it is leaking from the silicon seal where the bath meets the wall. A plumber recently visited us and told us that when the bath was originally installed it should have been sunk into the wall- he suggested that this was required by building regs and inorder to remove the risk of leakage he must remove a section of tiles and sink it into the wall. He is proposing work that will cost close to £1000- is this work needed and is simply using silicon to seal the bath a viable solution. Do building regs require you to install a bath in the manor detailed above.
All advice greatly appreciated