The argument is a comparison of two lists. Queensland Government's household preparation guidance names roof condition, loose tiles, eaves and screws, and gutters and downpipes that let water drain away, and the state's building regulator tells homeowners to "work safely to secure loose roof tiles or sheets." Set those beside what customers say a restoration consisted of — pressure cleaning, gutter cleaning, re-pointing of ridge caps, replacement of cracked tiles, and coating — and the overlap is close to complete. The state names these things as maintenance, so work that addresses them is maintenance too.
The mechanism sits under the ridge line, on tiled roofs specifically. The National Construction Code requires hip, ridge, barge and capping tiles to be fixed, and flexible pointing material complying with AS 2050 is recognised in the Code as one of the fixings that does that job. CSIRO co-developed the test method that assesses whether a pointing product still works as an adhesive mechanical fastener for ridge tiles after prolonged water saturation. A ridge line that has broken up is a fixing that has degraded — a maintenance condition, not a cosmetic one.
Wavell Heights is a suburb of whole, separately-titled houses: 91.0% of occupied dwellings are separate houses, against 74.8% across Queensland and 72.3% nationally, with townhouses at 3.0% and flats at 6.3%. On a whole house the roof is one household's to keep up. The Insurance Council of Australia — the peak body for Australia's general insurers — publishes that a house that has not been well maintained is at much higher risk of being damaged by extreme weather, and that insurers require you to confirm your home is well maintained when you apply for cover. That is the industry's own stated position, not a statement about your policy — your own policy and your own insurer are where you check where you stand. For townhouses and flats, the roof is usually the body corporate's to manage, and the business publishes that it coordinates with body corporates for townhouse complexes on roof cleaning.
Coating is the finish: it does not renew a fixing and it does not replace a cracked tile. The business publishes its own process order — inspect, clean, repair, coat and seal, then a final check — though that is its published process, not a universal industry order. Overlays are a separate question: Brisbane City Plan applies them lot by lot, and where a lot carries the Traditional Building Character overlay, work changing the street-visible form or material of a roof can trigger a development application — checkable per address on Council's City Plan mapping.