Hi there. I wonder if anyone has had similar experience regarding the following, and I hope I am posting this in the correct forum and it is appropriate Last year we purchased a Betts/Gladedale Dunkeld house which is approx 5 years old. I have had to put right many minor problems and/or get tradesmen to do so. From squeaking floor boards, leaking shower, poorly fitted windows/ patio doors etc etc etc. I would say however we do like the house. After the strong winds this week I noticed a knocking coming from within the internal wall. It has got progressively worse and is now happening when there is just a light breeze. After much listening and searching inside and out I reckon it is coming from within the chimney breast for the gas fire flue, or the wall area adjacent. The noise actually sounds like a bouncing ball with ever decreasing time interval between the thud. I have checked the gutters, eaves , attic etc and nothing apparent / no movement. The chimney pot thing looks solid and in order from ground level. It is a horrendous noise and is worst in my sons bedroom which makes it even worse. I am thinking wall ties ? loose internal boarding ? loosened debris ? probably caused by useless builders initially. Can anyone offer some advice before I rip out my sons wall in sheer frustration Any feedback welcomed gratefully. Cheers PS After contacting Betts/Gladedale customer services ( HAH !!!! ) a couple of times previously. I cant wait to do so again. Worse than useless.