Two different jobs
Roof restoration keeps the existing tiles or sheets and repairs and refreshes them. On a tile roof that usually means cleaning, replacing broken tiles, re-bedding and re-pointing ridges, and often applying a coating. On a steel roof it can mean replacing corroded fixings and sheets, treating rust and painting.
Roof replacement removes the existing covering and builds a new roof on the frame, with new battens where needed, new sarking and new flashings.
Both are legitimate. The question is which one your roof needs, and that depends on the condition of the material underneath the surface.
When restoration makes sense
- Tiles are still hard and sound. If a roofer can walk on the tiles without them cracking and they are not soaking up water, the roof has a structure worth keeping.
- Problems are concentrated. Cracked pointing, a few broken tiles, a tired valley iron or some blocked gutters are repairs, not reasons for a new roof.
- The battens and frame are fine. No sagging lines, no rot visible from the roof space.
- Steel has surface rust only. Rust on screw heads or light surface corrosion can be treated if the sheet itself is still sound.
In these cases, a restoration or targeted roof repair can be very good value.
When replacement is the honest answer
- Porous concrete tiles. Once the surface has eroded, concrete tiles absorb water, grow moss and lichen in the humidity and become brittle. A coating may look good for a while but does not restore the tile's strength.
- Rust-through. Steel rusted through at laps, around fixings or at the gutter line cannot be painted back to health.
- Widespread leaks. If leaks appear in new rooms each wet season, the roof is failing as a system.
- Battens or frame problems. Sagging, rot or loose fixings underneath need the roof off to fix properly.
- Asbestos cement. Restoration methods such as water blasting and coating are not appropriate on asbestos roofs; replacement through a licensed removalist is the safe path.
- No sarking in a humid, stormy location. Restoration cannot add a membrane under the existing covering.
Why restoration is sometimes oversold
Restoration is cheaper than replacement and easier to sell, and a freshly coated roof looks impressive in photos. But a coating cannot fix tiles that are breaking or steel that is rusting through, and it does nothing for battens or sarking. On the Sunshine Coast, where humidity and storms test every weakness, a cosmetic restoration on a failing roof often brings the leaks back within a few seasons.
Be cautious of door-knockers offering cheap coatings after a storm, very short warranty claims attached to coatings, and quotes that do not mention re-bedding, tile replacement or rust treatment before coating.
Questions to ask at the inspection
- Are the tiles or sheets structurally sound, and can you show me with photos?
- What would you repair before any coating goes on?
- What is the condition of the battens and sarking?
- If I restore now, roughly how long before replacement becomes necessary?
- What would replacement involve on this roof, and what would it change?
Thinking about the long run
Restoration buys time. Replacement resets the clock. If you plan to stay in the house for many years, factor in that a restored roof will eventually need replacing anyway, and that a replacement lets you add sarking, upgrade tie-downs and choose materials suited to salt and humidity. If you plan to sell soon, a sound repair job documented with photos is often enough.
A quick self-check from the ground
Before anyone visits, stand back from the house with binoculars or zoom in with a phone camera. Look for tiles that are a different colour from their neighbours (often replacements or slipped tiles), crumbling mortar along ridges, dark streaks of lichen, rust stains running down from screw heads, and any sag in the ridge line. Then check inside: stains on ceilings, flaking paint in the eaves and a musty smell in rooms below the roof. None of this replaces an inspection, but it gives you good questions to ask and helps you judge whether a contractor's recommendation matches what you can see.
Next steps
Read signs you need a roof replacement and how often should a roof be replaced for more context. The tile roof replacement page covers re-tiling and tile-to-steel options, and the cost guide has 2026 ranges for repairs and full replacement.
General information for Sunshine Coast property owners, not advice about your particular roof. Rules, products and programs change; confirm with the authority named, or with Sunshine Coast Council or Noosa Shire Council, before acting.