Value means cost over time
When owners ask for the cheapest roof, what most actually want is a roof that does not need major work again for a long time without a huge upfront cost. That means looking at:
- Installed cost: material, labour, battens and accessories.
- Expected life in your site's conditions.
- Maintenance needed to reach that life.
- Performance: heat, noise, condensation and storm resistance.
- Risk: what happens if the material is unsuited to the site.
Steel: usually the value leader
Why it is economical
Steel is light, quick to install in long sheets and needs fewer battens than tiles. Labour is generally lower, and the light weight can avoid structural upgrades on older frames.
When it is good value
Steel offers strong long-term value when the coating grade matches the site. Inland and in sheltered locations, standard pre-painted steel performs very well. Near the beach, a higher grade and matching fixings cost more but avoid early corrosion.
When it is false economy
Using a standard grade too close to the sea, skipping the blanket underneath, using incompatible fixings or leaving swarf on the roof all shorten its life and can affect warranties.
Concrete tiles: a middle option
Why owners choose them
Concrete tiles keep the look of many established streets, are quiet in rain and have good thermal mass.
The trade-offs
They are heavy and labour-intensive to install, costing more than steel. Their surface coating wears over time in sun and humidity, and they become porous and attract lichen. Ridges need periodic re-pointing.
Terracotta: the dearest common option, very durable
Why it can be good value
Terracotta's colour is fired into the clay and does not wear off. The tiles themselves can last a very long time.
The trade-offs
It is the highest upfront cost of the common options, it is heavy and, like concrete, relies on bedding, pointing, battens and sarking that wear sooner than the tiles.
Comparing the three
| Material | Installed cost | Weight | Coastal performance | Upkeep |
|---|---|---|---|---|
| Steel | Lowest of the three | Light | Good with the right grade and fixings | Wash sheltered areas near the sea; check fixings |
| Concrete tile | Middle | Heavy | Tiles are fine; fixings and flashings need care | Re-pointing; surface wear over time |
| Terracotta tile | Highest | Heavy | Very good tile durability | Re-pointing; valleys and flashings |
For actual price ranges, see the cost guide.
Hidden costs that change the picture
- Structural upgrades if moving from steel or fibro to heavy tiles.
- Approvals if the change of material requires them.
- Sarking or blanket, which should be included whatever the material.
- Gutters that may need replacing to suit the new roof.
Our view of value on the coast
For most coastal houses, a properly specified steel roof with a blanket underneath is the most cost-effective long-term choice. For owners who prefer tiles, a well-laid tile roof over good battens and sarking can also offer excellent value over time. In both cases, the biggest determinants of value are suitability for the site and installation quality.
Thinking in cost per year
A simple way to compare value is to divide the installed cost of each option by the number of years you reasonably expect it to serve before major work, then add an allowance for maintenance. The figures you plug in will come from your own quotes and the roofer's view of your site, not from a brochure.
What this exercise usually shows is that the gap between options narrows over time. A roof that costs a little more but suits the site, such as a coastal-grade steel roof near the beach, or terracotta on a frame built for tiles, can work out cheaper per year than a bargain option that needs early attention. It also shows how much installation quality matters: a roof that fails early because of poor flashings or missing sarking wipes out any saving from cheaper materials. Use the cost guide ranges as a starting point.
Related reading
Compare the two main options in Colorbond vs tile roofing, and for beachside homes read coastal roof materials. For costs in more depth, see what affects the cost of roof 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.