Yes, most cracked concrete pools can be repaired, and catching the problem early usually keeps the cost down. Fine surface cracks are often a simple patch-and-seal job, while deeper structural cracks need specialised repairs before the pool is resurfaced.
At Star Ocean Pools, our team has spent more than 10 years building and renovating concrete pools across the Gold Coast and Brisbane.
What are the signs of a cracked concrete pool?
Cracks don’t always show up as visible lines. You need to watch for:
- Water levels dropping faster than normal evaporation would explain
- Lines or splits in the interior finish, tiles or coping
- Loose, drummy or popping tiles
- Damp patches, sinking pavers or soft ground around the pool
- Rust stains, which can mean water is reaching the steel inside the concrete
What causes cracks in a concrete pool?
Ground movement is one of the biggest causes. The Queensland Building and Construction Commission (QBCC) notes that most Queensland homes are built on clay soils, which swell when wet and shrink when dry. That constant movement puts stress on the concrete shell.
Draining a pool at the wrong time is another common cause. Queensland Health warns not to empty a pool when the surrounding ground is saturated, as this may result in structural damage.
Other causes include tree roots, poor drainage, ageing concrete and construction faults.
Are all pool cracks structural?
No, many cracks only affect the surface finish, not the concrete shell. Hairline cracks in the pebble or render finish are common in older pools and mostly cosmetic. Structural cracks run through the shell itself, often widen over time and usually cause leaks.
As a rough guide, the QBCC says cracks wider than 2 mm in a concrete house floor are a sign of a real problem. Pools aren’t covered by that rule, but it’s a handy way to tell everyday wear from something more serious. Only an inspection can truly confirm whether a pool crack is structural.
How are cracks in a concrete pool repaired?
The right repair depends on how deep the crack goes. Common options include:
- Surface patching: filling and sealing fine cracks in the interior finish.
- Crack injection: pumping a sealant such as epoxy or polyurethane into the crack to stop leaks and bond the concrete.
- Crack stitching: fixing steel staples across a structural crack to hold the shell together.
- Resurfacing: applying a new pebble, tile or coated interior once repairs are done, which also refreshes the look of the pool.
Who can repair a cracked concrete pool on the Gold Coast or in Brisbane?
A pool builder with hands-on concrete experience is the best choice, because they can find the cause and not just cover the crack. Star Ocean Pools assesses the damage and handles pool renovations from repair through to resurfacing.
If you’ve noticed cracks or water loss in one of the many concrete pools Brisbane and Gold Coast homes rely on, contact our team to book an inspection.
Frequently Asked Questions About Concrete Pools on the Gold Coast and in Brisbane
Is a crack in a concrete pool serious?
It depends on the crack. Surface cracks are usually cosmetic, but leaking or widening cracks need a quick inspection.
Can you swim in a pool with a crack?
Usually, if the crack is small and the water level is stable. If it’s losing water fast, get it checked first.
Should I drain my pool to fix a crack?
Not without professional advice. Draining a concrete pool at the wrong time, especially after heavy rain, can cause more damage.
How can I tell if my pool is leaking?
Place a bucket of water on the pool step and mark both water levels. If the pool drops faster than the bucket, you likely have a leak.
