Please, can anyone give me advice. 10 weeks ago had a conservotary on the back of our bungalow. Joining the conservotery to the bungalow they have used like a tin box guttering and at the one end after heavy rain only I get a leak inside the conservotary. When it rains the noise of the water going into the box guttering is very bad and it is like the sound of you filling up a bath with water. The builder dose not want to know. thank you all. Roger and Val