Tom, there is nothing in your post that refutes my post.
As I said, the materials were either not to spec (cost cutting) or the spec was wrong (negligence)
All the politicising of this tradegy is really quite tiresome, and grubby.
It's down to building regs.
The materials were either not up to specification or the specification was wrong.
I’ve lost count of the amount of Local Authority Tenders I’ve put together now, the last page always explains how the Tender is weighted, costs always being 50%.
It doesn’t ever surprise me though that the eventual winner is the one who comes in with the lowest cost.