The South Australian government has announced it is moving into phase two of its audit into Adelaide CBD buildings containing aluminium composite panel (ACP) cladding, following 77 buildings identified as “warranting further consideration”.

The second phase will confirm whether the cladding has been installed in compliance with the National Construction Code and relevant fire safety measures.

The audit is being conducted by the Department of Planning, Transport and Infrastructure (DPTI), the Metropolitan Fire Service and the City of Adelaide.

Phase one included assessment of 4500 buildings in the CBD over two storeys, and of the 77 buildings identified as needing further investigation, the government said 38 had “very limited or isolated” ACP cladding.

According to SA planning minister John Rau, phase two would be a more detailed “building-by-building” investigation that would assess fire safety systems.

He said South Australians should not be alarmed at the presence of ACP cladding on buildings.

“Certified ACP cladding products are safe, when installed in accordance with the National Construction Code,” he said.

“I have asked all local councils and private certifiers to advise DPTI immediately if they have concerns about the safety or compliance of any buildings which contain ACP.”

The government said that if any risks were identified, “immediate action” would be taken by.

Outside of the CBD, the DPTI has advised the government that about 30 councils are likely to identify buildings containing ACP cladding.

The cladding used on the Grenfell building in London, which sparked nationwide audits of buildings, was found to be non-conforming, containing a combustible polyethylene core not approved for high-rise applications.

Similar audits are being conducted by state and territory governments around the country.