builder open the roof last week to complete the extension. it was raining heavily last night and water came into the ceiling of the bedroom facing the new extension. most of the water came out of the ceiling rose which made the light build exploded. when I go out to the extension and touch the newly build wall and the scaffolding pole I get electric shock. the same happened when I touch the kitchen sink with barefoot in the kitchen. I have three small children and I am very worried about their safety. what is the reason of the electric shock and how it an be eliminated?