Hoping someone might have a dh or dp who might know the answer to this question (don't mean to be sexist - if any mum knows the answer then suggestions gratefully received!) I have a property which I let out - every time the people next door light a fire, smoke comes down the chimney in the adjoining room in my property and fills up the room. I had a builder to look at it yesterday who said he thought it was a blockage and to get a chimney sweep in. I then rang a chimney sweep who said it didn't sound like a blockage! I am at my wits end with this as you can tell by the when I am posting this thread - woke up at 4am this morning and couldn't sleep for worrying about it! Any help/suggestions would be greatly appreciated.