Hi. I really do need some help on this. I'm also new on here so be kind please. Right this is the problem. I have a draft coming down the stairs, it's so bad that when I put a candle on the stairs it very nearly blows it out. Its a semi but the stairs are in the middle, so no outside walls. All rooms upstairs have draft excluders fitted. No room up stairs shows any signs of draft. The loft hatch is in the bathroom and no draft from there either. When all doors upstairs are closed the draft is still there. It's so bad you can feel it on your face when you walk upstairs. The stairs have a brand new carpet and underlay. All the skirting boards and stair rails have no gaps. Please if you can give me any ideas on what to check next I would be very grateful. Paul