"The Australian business, AGG, had a disappointing year, taking longer than expected to recover from the significant operational changes we've made over the past 18 months," Mander says in a statement.
The New Zealand operations lifted earnings before interest and tax before significant items by 6 per cent to $31.1m while the Australian operations made a $4.8m ebit loss compared with a $3.2m ebit profit the previous year.
"We have a clear strategy and plan in place for AGG and, in the latter stages of the financial year, we improved service delivery in all three states, reduced reworks and achieved a more stable and engaged workforce," Mander says.
AGG operates in New South Wales, Victoria and Tasmania.
"These positive changes have resulted in a number of former customers already returning and we're focused on regaining their confidence and trust."
Revenue in Australia fell 9 per cent to $50.4m while New Zealand sales rose 2 per cent to $217.4m.
Metroglass says its changes in Australia include a major capital programme, a shift from domestic to international glass supply, moving the business' manufacturing and sales focus towards double glazing products and opening a manufacturing plant in Tasmania.
The company says the start-up of that factory, its seventh in Australia, met its first year financial goals, including breaking even on an ebit basis in the final quarter of 2019.
It also had operational problems in the other two states.
New Zealand fundamentals remain strong but Metroglass expects supply constraints and it expects Australian housing starts will decline further.
Metroglass is paying no dividends this year after paying 7.6 cents per share last year.
Mander says the company will provide preliminary guidance for the current year at its annual shareholders' meeting on July 26.
"While being acutely aware of the challenges ahead, Metroglass is firmly focused on rebuilding shareholder value through further improved performance in New Zealand and by executing its plan for stabilising and growing the Australian business," he says.
Metroglass shares ended yesterday at 40 cents and they have declined about 52 per cent in the past 12 months.