The New Zealand High Court has given permission for a leaky building class action to proceed against cladding maker James Hardie.

The action claims James Hardie was negligent in its design, manufacture and supply of the Harditex and Titanboard cladding systems. The first Harditex claim was brought by Tracey Cridge and Mark Unwin, who claim their Wellington home suffered widespread internal water damage – estimated to cost more than $300,000 to…