I think I already know the answer to my question but just wanted confirmation I'm not looking a gift horse in the mouth!
I was approached yesterday by a man offering free cavity wall insulation. I usually say no straightaway to these things but for some reason I let him drill a hole in the side of my house and another in my extension to check if suitable for insulation. Of course he said it was and they'd be round today to do the work.
My house is a 1960s build and I knew I'd read this kind of insulation could be problematic in older houses when retrofitted. Obviously I spent all night researching and came to the conclusion that if a really thorough survey is done, amazing installers are used, as well as the right stuff then actually it can be a good thing. However, as I know nothing about this company, have read these companies get fined for not fulfilling their quota and the guy was incredibly pushy, didn't seem to know what he was talking about and only checked 1 wall I decided it wasn't a good idea!
They came today, I said I'd changed my mind. Guy looked surprised but left quickly. Had several calls from a mobile which I ignored but now the "area manager" has knocked. Extremely pushy. I asked for paperwork which he didn't have and just allowed me to photograph stuff on his phone. Apparently I'm going to save 900 a year, yesterday it was 300 😂 and as they're so kind they'll fit a bathroom extractor fan too. He showed me the stuff they'll use. I had read the balls are best but this was white wool. I asked exactly what it was. He said "new wool" 🙄 Said my brickwork is in amazing condition... it isn't particularly, which I know is another issue. Coming back tomorrow, they usually wouldn't for 1 house but they'll make an exception.
I've dodged a massive bullet haven't I 🤔🤔