Global building materials supplier James Hardie Industries has been dragged back into the New Zealand government's class action over leaky school buildings.

James Hardie NZ Holdings was named as a defendant in April last year when the Ministry of Education first filed the suit, later cutting a deal with the government department in a confidential settlement.

However, it has now been pulled back into the action, with another defendant filing a cross-claim against the building materials maker.

"The company is not yet able to determine the amount or range of loss, if any, that the company's may become liable for in future periods," the James Hardie NZ accounts say. The company reached a settlement with the education ministry last year and at the time, James Hardie and the New Zealand ministry said the deal would support the remediation of weather-tightness issues in existing school property and support future developments across the country.

The ministry said there were 742 buildings in the remediation programme and a further 1,346 were identified as a high or medium high priority for more testing.

It is still pursuing legal action against Carter Holt Harvey after the New Zealand-owned building products maker failed in a bid to have the case quashed.