Stakeholders are calling for Fletcher Building's chairperson to resign over a Gib board supply crisis.
The construction giant owns nearly 94 percent of the market.
Building company Simplicity Living has already dumped Fletcher Building as a supplier, instead, opting to directly import plasterboard from Thailand.
Chief executive Sam Stubbs says Fletcher supplied Gib is over-priced and takes months to arrive.
Now he is demanding for heads to roll.
He spoke to Corin Dann.
