Yep. I asked for 15mm fireboard and got 12.5. Paid a deposit before they started removing the asbestos so the balance now is pretty much zero. Saw me coming. Lesson learnt.
So I guess I'm going to have to add another layer of something to meet the regs. Well, it'll be a good learning experience.
I hope this is the right place to put this. I'm not a great DIYer so the DIY forum didn't seem quite right. I've just had some pink plasterboard put up in my garage to replace damaged asbestos cement board. I have two questions, should anyone feel inclined to respond on a Friday evening...