The James Hardie class action court case is one to follow. It's complex. It'll last a while. It has lashings of QCs and James Hardie are denying everything.
But in a nutshell the allegation is that Hardy's designed, manufactured and supplied a couple of building products that didn't work. And as a result people have seen their homes leak. Their value destroyed. Their repair bills cripple them. And they want someone to pay.