Combustible cladding has been confirmed on five Queensland government buildings, making them fire risks that will cost millions to fix.

An audit investigated the extent of combustible polyethylene cladding in Queensland, following the deadly fire at the Grenfell Tower building in London, identifying 172 government-owned buildings for further investigation.

Cladding is being replaced on the Queensland Rail building on Edward Street. Credit:Robert Shakespeare

Authorities have now confirmed Logan Hospital will require remediation work, which is yet to start. The extent of work at the Logan Hospital and the associated costs were not yet available.

Work has begun on a Queensland Rail building next to Central Station in the Brisbane CBD and the former Children's Court building on Quay Street.