Pre-1987 Adelaide homes commonly have asbestos cement (AC) roofs. Removal is regulated and costs $8,000-$15,000 for a typical small home before any new roof installation.
Identification
AC cement sheet is grey, often corrugated, with visible aggregate. Common on garages, outbuildings, and some 1950s-70s Salisbury/Elizabeth/Munno Para housing.
Licensing
Bonded AC over 10m2 = Class B licensed removalist. Friable AC = Class A. Garage roofs are usually well over 10m2.
Disposal
EPA-licensed transporter, EPA-approved landfill (Wingfield, Inkerman, Highbury). You receive disposal documentation.