http://
They're fine in the right circumstances, but can move out of place. At one time you could have a look at the NHBC Standards, but now, they want you to buy them :o(
I doubt if there's any NHBC cover for this anyway. I'm afraid it's going to be down to the "goodwill" of your builders. Oh dear :o(
It surely wouldn't take a lot on their part to put it right.



