Can anyone help please? For the last couple of months or so there has been a banging noise coming from our conservatory. It sounds like someone is throwing a lump of mud at the window! It's completely random and can happen at any time of day (usually 5 or 6 times a day). Its very puzzling and seems to be coming from the lower right hand corner. The conservatory is roughly 12x7.5ft, UPVC with a dwarf wall, about 5years ago we had the polycarbonate roof replaced with a 'blue' glass one (waste of money) but the noise is not coming from the roof. It's getting rather worrying to be honest. There is no fixed heating in there just a portable oil fired radiator that is on a frost setting. Thanks.