CSR expects to make a decision on whether it will spin off Viridian glass by the end of the year, after the troubled business weighed heavily on the construction material supplier's half-year result.
CSR announced on Friday its half-year profit plummeted 77 per cent to $26.8 million on the back of nearly $76 million in impairments to Viridian, sending shares in CSR more than eight per cent down in early trade.
They were worth $3.30 at 1055 AEDT, down from $3.59.
CSR had earlier flagged Viridian as a potential sale item ahead of commencing a review in July.
"While Viridian's earnings have improved in the first half of the financial year, the performance remains below internal targets," the company said in a note.
"(The July 2018) review is materially progressed and the company expects to make a final decision by the end of this calendar year."
CSR said its revenue lifted 6.0 per cent to $1.4 billion, though steady demand from the detached housing market and growth in commercial projects was offset by slower activity in high-rise apartments, and a drop in earnings on aluminium.
Excluding Viridian, the company's half-year net profit after tax was down 31 per cent to $94 million.
CSR is issuing a dividend of 13 cents, fully franked, down from 13.5 cents, 50 per cent franked, during the last interim period.
CSR's H1 RESULTS:
* Net profit down 77pct to $26.8m
* Revenue up 6.0pct to $1.4b
* Interim dividend down 0.5 cents to 13 cents, fully franked
