Ask ten contractors what goes into a pool quote and you’ll get ten different answers. Some list the steel and the concrete grade. Others just write “shell” and move on to the finish. In reality, the pool construction materials that make up a build fall into five groups: the structural shell, the fittings set into the concrete before it sets, the equipment that runs the pool, the finish, and the paving and coping around the edge. Knowing what belongs in each group is the fastest way to tell a properly specified quote from one that’s cutting corners somewhere you can’t see.
The shell nobody sees again
Every pool starts as a reinforced concrete shell, regardless of the finish going on top of it later. Steel reinforcement runs through as Y8 bars and 100mm mesh wire, tied into a ring beam around the full perimeter. The concrete itself is 30 MPa ready-mix, poured to 150mm thick across the floor and walls.
This part of the build sits underneath everything else, and it has to be right the first time. Nobody wants to open a finished shell to check the steelwork once the pool is full of water and the garden’s been paved around it.
Fittings that go in while the concrete is still wet
The weir, the aim-flow fitting, and the LED light don’t get added once the shell is finished. We position them while the concrete is still setting, so they bond directly into the structure instead of sitting in a hole cut and patched afterwards.
Once the shell is poured, it needs three to five days to cure properly before the build moves to the next stage. Rushing that window to save a day is where problems start. A fitting set into concrete that hasn’t cured fully shifts slightly for years afterward, and that’s usually where a leak develops around a light housing or a return line, long after everyone’s forgotten it was rushed.
The equipment that actually runs the pool
Once the shell has cured, the pool needs equipment to filter and circulate the water, and this is where quotes start to differ more than most homeowners expect. We install what we call the “Box” — a combination unit that includes the pump, the sand filter, an electrical distribution board with a battery-backed timer, and a pump house to keep it all protected from the weather.
Some installers price the pump and filter separately and leave the electrical side vague. That’s worth asking about directly. A distribution board without proper battery backup resets its timer every time the power drops, and that happens often enough in Gauteng to matter over a year of ownership.
Once the Box is in, the smaller fittings — the weir, the aim-flow, the LED light — get connected, and the wiring for all of it runs back to the board. This is also the stage to plan in any extra pump capacity for a water feature, like a weir wall or a spout. Adding that capacity after the equipment is boxed and wired costs far more than specifying it upfront.
Coping, paving, and the apron around the edge
Bull-nose copings sit on the pool’s edge, and they’re normally 450x450mm flagstone. Paving matches that size and extends outward to form a 900mm apron right around the pool.
That apron isn’t decoration. It gives swimmers dry, non-slip ground to stand on, and it keeps loose garden soil from washing straight back into the water after rain. Thinner paving or a narrower apron might shave a few thousand rand off a quote, but it wears through faster under constant foot traffic and sun, and it does less to keep the pool clean between chemical treatments.
Piping, tiles, and the finish itself
For marbelite pools, ceramic mosaic tiles go in along the waterline, and the plumbing runs on 50mm PVC piping for suction and return. That pipe diameter isn’t arbitrary. Go narrower, and the pump works harder to move the same volume of water, which shortens its working life and quietly pushes up your running costs, month after month.
The finish itself is where marbelite and fibreglass part ways completely, both in material and in method. Marbelite is a mix of white cement and marble aggregate, applied by hand and left to cure overnight before the pool goes near water. Fibreglass finishing works the other way around: the shell gets plastered first and left to dry completely, and only then does resin and gelcoat go on and cure.
Marbelite vs fibreglass finish materials at a glance
| Finish material | Look and feel | Best suited to |
|---|---|---|
| Marbelite | Classic, matte plaster finish | Natural stone, warmer, more traditional exteriors |
| Fibreglass | Smoother, consistent surface with a slight sheen | Cleaner, more contemporary lines, newer developments |
Neither is the “better” material on its own. Each is suited to a different setting, and the right one depends on the house around the pool as much as the budget for it. If you want a fuller technical comparison of how the two hold up over time, an independent comparison of marbelite and fibreglass pool finishes is worth reading alongside your quote.
Materials you can check yourself, and materials you can’t
Some of these materials you can put your hands on before you sign the final invoice. Coping stone, paving, tile colour, and the pump housing are all visible on site. You can check the size, the finish, and the fit for yourself before the pool is filled. If a coping stone doesn’t sit flush or a paving joint looks uneven, you’ll see it immediately.
Steel bar size, mesh spacing, concrete strength, and pipe diameter are a different story entirely. Once the shell is poured and backfilled, none of it is visible again without breaking into a finished pool, which nobody wants to do over a suspicion. This is why it’s worth asking to see the ready-mix delivery docket or the steel itself before it goes into the ground, rather than trusting it after the fact. A contractor confident in what’s going in has no reason to make that awkward.
Comparing pool construction materials on a quote
When you’re comparing quotes side by side, the line items matter less than what’s actually specified inside them. A quote that just says “concrete shell” tells you nothing about the steel grade or the wall thickness behind it. A quote that says “equipment” tells you nothing about whether the electrical board has battery backup, or whether a pump house is even included.
Ask for the numbers, and expect a straight answer on each of these:
- Steel bar size and mesh spacing
- Concrete strength in MPa and wall thickness
- Coping and paving dimensions
- Pipe diameter for suction and return
- What’s included in the equipment — pump, filter, board, pump house
A contractor who answers immediately, without checking a supplier catalogue, is specifying to the same standard on every build. One who needs to go find out is probably adjusting materials from job to job, based on what happened to be available or what a tight budget allowed that week.
We price new builds as one overall figure that already accounts for every material listed above, and small adjustments within the build — a different light colour, a different sand grade for the filter — don’t move that number once the quote is signed off. The pool construction materials themselves are the fixed part of the job. The layout, the finish, and the extras built around them are where the real decisions happen.
Frequently asked questions
What are the main components of pool construction materials?
Pool construction materials are typically divided into five main groups: the structural shell, the fittings installed during concrete pouring, the equipment for water circulation, the interior finish, and the surrounding paving and coping.
What makes up the structural shell of a pool?
The pool shell is constructed from reinforced concrete, using Y8 steel bars and 100mm mesh wire. The concrete itself is a 30 MPa ready-mix, poured to a thickness of 150mm on both the floor and walls.
Why is it important to install fittings while the concrete is wet?
Fittings like the weir, aim-flow, and LED lights are positioned while the concrete is still setting. This ensures they bond directly into the structure, preventing potential leaks that can occur if holes are cut and patched later.
What equipment is essential for running a pool?
Essential pool equipment includes a pump, a sand filter, and an electrical distribution board with a battery-backed timer. It’s also important to have a pump house to protect this equipment from the weather. Some installers may offer these components separately.
What are the typical materials for pool coping and paving?
Pool coping usually consists of bull-nose flagstone, typically 450x450mm. The paving around the pool matches this size and extends outwards to create a 900mm apron, providing a non-slip surface and preventing garden soil from entering the water.
What is the difference between Marbelite and Fibreglass pool finishes?
Marbelite is a classic, matte plaster finish made from white cement and marble aggregate, suited for traditional exteriors. Fibreglass offers a smoother surface with a slight sheen, ideal for contemporary designs. The application methods also differ significantly.
Know what you're paying for
A proper quote breaks down the shell, the fittings, the equipment, and the finish separately, so you can see exactly where your money goes before any concrete is poured. Get a quote for your build, or email us for a non-binding quotation if you'd rather talk through the details first.