Oh my, only 9 months before a response, looks like customer service is getting faster. The client was my husband as I leave the frustrating things such as dealing with people like this to him. Even if my husband wasn’t asthmatic and apt to needing windows open the poorly sealed double glazing and improperly secured loft-spaces meant the flat was wonderfully well ventilated throughout the year whether we wanted it so or not. We did keep an eye on the tiling seals when they began to degrade we contacted the letting agency to sort it out. They sent their man around to create some mess, not actually fix anything, then leave and things were no better. We tried again when they actually started to come off but it was just more of the same. Given we were on the top floor I wonder who had the plumbing leak above us. Should I perhaps check if God has piping issues? I have heard that prayer is a likely resort when using CL. We did contact the landlord and letting agents as we could clearly see the problems were coming both from the roof and the dividing wall to the tenement next door. Alas things got no better and we left for somewhere nice as soon as we could. PS. Do beware of any«fees» that they may charge for drawing up contracts.