Mike...I saw something on watchdog or similar a while back basically saying that these companies tend to get out of their guarantee on the basis of maintenance of the outer skin of brickwork...they come out, do a survey and basically say it's your own fault because of dodgy pointing etc.
I'm the only one on our street that hasn't had it done...our house is freezing, but rather cold than damp. I also used to be a surveyor (husband was one also) and I remember getting one of my college construction manuals out when we had someone trying to flog it to us, showing him what a cavity was for and what cold bridging was...the bloke then admitted that he wasn't a surveyor as he had originally stated and had only been with the company a couple of weeks and just had to learn a script.
I had british gas out a few months back installing a smart meter and the bloke that came out said they were having all sorts of trouble with people complaining of the insulation causing damp.
Good luck with the guarantee...but I wouldn't hold your breath.
As I said in my previous post, employ a properly qualified Chartered Surveyor who will have the appropriate qualifications after his name.
It seems to me anybody can call themselves surveyors, without knowing anything about building technology. Took me 5 years to get qualified!
An experts report is what you need to take these people on especially if it ends up in court.
Good luck in your endeavours.
I would agree that cavity wall insulation is a bloody nightmare....wish we had never had it done.
I live in a modernish property, built in the 80s, which didn't really have issues with keeping it warm and so on but the cavity wall was offered for free, so we took up the offer. I wish we never had.
Within weeks our loft was literally dripping wet. We had to leave the loft door open constantly to stop this happening and to allow things to properly dry out.
Since then we have had to have suitable ventilated ridge tiles fitted and all the upstairs windows in the house are always partially open on the trickle setting, or everything just steams up with condensation.
I have come to the view that our house, being of relatively modern design,didn't need additional insulation, and when it was installed it reduced the ventilation to such an extent it was counter productive.
I'm told removing the cavity wall rock fill stuff is extremely expensive. Just keep your windows open like we have