Certification has been withdrawn for several types of building cladding amid heightened fears of fire hazards across Australia and globally.
The Victorian Building Authority regulator has issued an alert for nine types of aluminium composite and expanded polystyrene cladding which no longer comply with construction codes.
The change is based on recommendations by CertMark International, which oversees approvals for products used by the Australian and New Zealand building sectors.
A statement from the authority says more information is being sought about the withdrawal of certification, but urged builders to spread the news.
"Certificate holders are obliged under CodeMark Australia rules to notify existing customers of this withdrawal," the statement read.
But CertMark said claims the products were non-compliant were "totally erroneous".
Products that were withdrawn met with Victorian standards for aluminium composite panels to have less than 30 per cent combustible content, the company said.
It added that moves have already started for the products to be re-certified.
"CMI will be specifically addressing all areas of concern on the revised certificates, with the reissue process well underway."
National President of the Builders Collective of Australia Phil Dwyer on Thursday shared his understanding of the change.
"These products are all panels so they obviously feel they are all dangerous and that is best to withdraw them," Mr Dwyer told 3AW.
"Who suffers along the way is the end user, the consumer that has innocently bought a compliant building to now find that it's not compliant through this cladding, and they've been hit with bills of $50,000 to $100,000 each, retrospectively."
Cities across the world were put on notice after London's Grenfell Tower fire in June 2017, when an inferno engulfed the 24-storey block of flats, killing 72 people, including two Australians.
A fire earlier this month at Melbourne's Neo200 building, covered in flammable cladding, renewed the push to identify hazardous products.
Some residents have been able to return to the 41-storey tower, while others remain locked out pending safety works and could be displaced for months.
States and territories have agreed to an in-principle nationwide construction ban on combustible cladding since the fire.
A list of the nine products can be found at www.vba.vic.gov.au
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