If you are planning a pool in Geelong, the first big decision is usually fibreglass or concrete. Both can give you a beautiful backyard. They get there in very different ways, and the differences show up for the next 20 years, not just on install day.
We have been building pools around Geelong, the Bellarine and the Surf Coast for more than 35 years, and these days we install Compass fibreglass pools. So yes, we have a view. We will still give you the honest trade-offs, including the situations where concrete is the better call.
Key takeaways
- Fibreglass installs in weeks, concrete in months.
- Fibreglass has a smooth, non-porous surface, so it needs fewer chemicals and less cleaning.
- Concrete gives unlimited shapes and sizes, but needs resurfacing every 10–20 years.
- Over 20 years, fibreglass is usually the cheaper pool to own.
Fibreglass vs concrete at a glance
Here is the short version. The sections below explain each row in more detail.
| Factor | Fibreglass pool | Concrete pool |
|---|---|---|
| Install time | 1–2 weeks for the pool once approved | 2–4 months on site |
| Surface | Smooth, non-porous gelcoat | Porous render, pebble or tile |
| Chemical use | Lower | Higher (concrete affects pH) |
| Algae resistance | High — little for algae to grip | Lower — porous surface |
| Resurfacing | Not normally required | Every 10–20 years |
| Shape and size | Choose from a range of moulds | Fully custom |
| Feel underfoot | Smooth | Can be rough on feet |
| Weather risk during build | Low — short build | Higher — long build exposed to rain |
| Typical warranty | Long structural + surface warranties | Varies by builder |
Installation time and disruption
A fibreglass pool is manufactured in a factory under controlled conditions, then delivered as a single finished shell. On site, the job is excavation, base preparation, craning the shell in, plumbing, backfilling and filling with water. Once permits are through, the pool itself is usually in within a week or two. Fencing, paving and landscaping follow.
A concrete pool is built from scratch in your backyard. That means excavation, steel reinforcement, spraying the shell, curing, then rendering, pebbling or tiling. Each stage needs its own trade and its own dry weather window. In a Geelong winter or a wet spring, that can stretch a project well past three months.
For families, the difference is real. A short build means less time with a hole in the backyard, a temporary fence and trucks on the driveway. It also means you are far more likely to be swimming the same summer you decide to build.
Surface, feel and day-to-day maintenance
This is where fibreglass earns most of its reputation. The interior is a smooth gelcoat surface. It is non-porous, so algae has very little to grip, and it does not leach lime into the water the way concrete does. In practice that means less brushing, fewer chemicals and more stable water.
Concrete pools are finished in render, pebble or tile. Pebble finishes look great but are porous, which gives algae more places to settle and makes the water chemistry work harder. Concrete also slowly raises the pH of the water, so you will be adding acid more often.
Compass takes the surface a step further with its Ceramic Core laminate and Vantage in-floor self-cleaning option, which cleans the floor and steps and circulates heated, sanitised water through the whole pool. If low maintenance is high on your list, it is worth reading how self-cleaning pools actually work.
Durability and lifespan
Both pool types can last for decades when they are built properly. The difference is what you need to do along the way.
A well-built concrete pool shell is strong, but its interior finish wears. Most concrete pools need resurfacing every 10 to 20 years, which means draining the pool, removing the old finish and applying a new one. It is a significant cost and a lost summer if the timing goes badly.
A quality fibreglass shell is engineered to flex slightly with ground movement rather than crack. Compass pools use a reinforced Maxi Rib structure and are backed by a structural, cosmetic and hydrostatic warranty. With a Bi-Luminite colour, the structural warranty is lifetime. If cracking is your worry, our article on whether fibreglass pools crack covers what actually happens and why, and how long a fibreglass pool lasts goes deeper on lifespan.
Cost: upfront and over 20 years
The upfront price of a pool is only part of the story. What you spend over the life of the pool matters just as much.
For a comparable size, a fibreglass pool is usually less expensive to install than concrete, mainly because so much of the work happens in the factory. Your total project cost still depends heavily on your site: access for the crane, how much soil comes out, rock, slope, fencing, paving and landscaping.
Over time, fibreglass tends to pull further ahead:
- No resurfacing bill in year 10 to 20.
- Lower chemical spend because the surface does not push the pH up.
- Lower running costs because cleaner, more stable water often means less filtration time.
We break down every line item, from excavation to fencing, in our guide to what a fibreglass pool costs in Geelong.
Design freedom: where concrete still wins
We would not be giving you an honest comparison if we skipped this. Concrete pools can be any shape, any size and any depth. If you want a very wide pool, a pool built into a cliff edge, an infinity edge on a steep site or a shape that follows a curved building line, concrete may be the only way to get it.
Fibreglass shells have to travel by road, which limits width to around 4.2 to 4.5 metres. You also choose from a set of moulds rather than designing from scratch.
That said, the Compass range is broader than most people expect. It covers family shapes like the Sanctuary, architectural rectangles like the Vogue and Contemporary, the X-Trainer for families who also swim laps, the Fastlane lap pool that extends up to 30 metres, a compact plunge range, and pool and spa combos. There are also 14 exclusive water colours. Most Geelong backyards find a good fit.
Which is right for a Geelong backyard?
Choose fibreglass if you want:
- a pool this summer rather than next
- lower maintenance and lower running costs
- a smooth, family-friendly surface
- long, clear warranties from a single manufacturer
Choose concrete if you need:
- a size or width no fibreglass mould offers
- a fully bespoke shape or an architectural feature like a wet edge on a steep site
Geelong blocks bring their own considerations. Highton and Belmont often have slopes, Ocean Grove and Barwon Heads have sandy soil and a high water table, and Armstrong Creek and Leopold have new estates with tight access. Fibreglass handles all of these well with the right site preparation. Our coastal building guide explains what changes near the water.
The bottom line
Concrete gives you total design freedom at the cost of time, maintenance and a resurfacing bill down the track. Fibreglass gives you a faster build, a smoother and easier-to-care-for pool, and lower lifetime costs, within a wide range of proven shapes.
For the families we work with across Geelong, the Bellarine and the Surf Coast, fibreglass is the right answer most of the time. When it is not, we will tell you.
Frequently asked questions
Is fibreglass or concrete better for a family pool?
For most families, fibreglass. It is faster to install, smoother on feet and hands, needs fewer chemicals and less brushing, and the moulded shapes already include steps, benches and ledges designed for kids and adults. Concrete makes more sense when you need a size or shape no fibreglass mould can match.
How long does a fibreglass pool take to install compared to concrete?
Once permits are approved, a fibreglass pool is typically in the ground and filled within one to two weeks, with fencing and paving following. A concrete pool usually takes two to four months because the steel, spraying, curing, rendering and tiling all happen on site.
Do fibreglass pools need resurfacing like concrete pools?
Not in the same way. A concrete pool’s render or pebble finish typically needs resurfacing every 10 to 20 years. A quality fibreglass pool’s gelcoat surface is designed to last for decades with normal care, and Compass Pools backs its surfaces with a cosmetic warranty on top of the structural warranty.
Can a fibreglass pool be installed on a sloping or sandy block?
Yes. Sloping blocks are handled with retaining and engineering, and sandy or high-water-table sites around the Bellarine and Surf Coast are handled with the right base preparation and hydrostatic protection. We assess every site before quoting.
Are fibreglass pools cheaper than concrete?
Usually the pool itself costs less upfront, and fibreglass is almost always cheaper over its lifetime because there is no resurfacing and lower chemical and electricity use. The total project cost still depends on site access, excavation, fencing, paving and landscaping.
What sizes do fibreglass pools come in?
The Compass range runs from compact plunge pools under 3 metres up to family pools over 10 metres, plus lap pools that can be extended to 20 or 30 metres. Widths are limited to what can travel on a truck, which is why very wide custom pools are still a concrete job.