"The issues we experienced in B+I were the result of poor project and business unit governance and ineffective project management ... with new leadership, improved project governance, core systems and processes, and a better approach to what we bid for and how we price those bids, we are confident B+I will improve in [this financial year]," he said.
Norris said it was important to realise that Fletcher Building was not simply a construction company, and the performance of B+I was "in stark contrast to the performance of the broader Fletcher Building portfolio and other businesses within the construction division".
Norris said it would take months to find a new chief executive to replace former boss Mark Adamson, who left his role abruptly after the announcement of the second earnings downgrade.
"With your continued support we are confident that Fletcher Building will emerge stronger in FY18," he said.
Fletcher's shares closed for the day up 1.2 per cent at $8.45.