In this article
Most pool owners go through the same hesitation: the water is dropping a little, but is it a leak or evaporation? Is it worth calling for an inspection or should I wait? That is natural, because inspection takes time and effort, and evaporation really can be significant on some days. But certain signs make waiting a risk. This article helps you recognise the moment to request an engineering inspection and tell it apart from cases where home monitoring is enough.
Start with simple home monitoring
- Mark the water level on the tiles with tape or a waterproof pen and note the date.
- Run a bucket test: a bucket of pool water on a step at the same level, compared after a day or more.
- Record refill days and how much water you add each week.
- Note heavy swimming days or waterfall use, which raise losses naturally.
If the pool drops about as much as the bucket, it is most likely evaporation. If it drops clearly and consistently more, that is a first sign worth attention. See leak versus normal evaporation.
Signs inside the pool
- Loss greater than the bucket across more than one test.
- Rising refill needs week after week.
- Hollow or falling tiles in one area, especially if sudden.
- New cracks or old cracks widening.
- Sediment or soil entering through a crack or floor fitting.
- Hard-to-balance water because constant top-ups shift chlorine and pH.
- Air bubbles from return inlets, which can mean a suction-side leak drawing in air.
Signs outside the pool, often more serious
Water leaving the pool has to go somewhere, and the clearest signs are often outside the shell:
- Persistent damp patches in soil or lawn around the pool, even without irrigation.
- Sinking or cracking in surrounding decks and paths.
- Water or damp in the pump room.
- Damp on a house wall, a room next to the pool or a nearby basement.
- An unexplained rise in the water bill alongside frequent refills.
The risks of ignoring a leak
A small leak does not stay small. Water lost daily adds up over weeks and months and sets off a chain: soil under and around the pool becomes saturated and may settle; the shell moves, new cracks appear and the leak grows; steel exposed to constant water rusts, expands and breaks the concrete; damp spreads to adjacent decks and walls; and water and chemicals are wasted every day. Each step makes the repair bigger. Early inspection stops the chain at the start, when treatment is usually local.
Why inspection is more than finding a hole
An engineering inspection also assesses the leak's effect on the structure: has water reached the steel, has the soil settled, are existing cracks a result of the leak or its cause? Those answers decide whether fixing the leak point is enough or wider concrete and soil treatment is needed. Inspection protects your investment in the pool and the house itself, which matters even more where the pool sits close to the building or above a basement.
Choosing a reliable inspector
- Which tests will you run, and in what order?
- Do you pressure-test lines, or only inspect visually?
- Do you have listening or underwater camera equipment if needed?
- Will I receive a written report with results and photos?
- Does the report assess structural impact, not just location?
A provider that explains its method clearly usually delivers an inspection you can rely on. Treat a diagnosis at first glance with caution.
Quick guide: monitor or inspect?
| Situation | Action |
|---|---|
| Pool drops about as much as the bucket | Monitor at home |
| Pool drops more once | Repeat the test and watch |
| Pool drops more repeatedly | Request an inspection |
| Water loss with cracks or hollow tiles | Request an inspection soon |
| Damp walls or sinking decks | Request an inspection immediately |
| Broken main drain cover with water loss | Stop swimming and inspect immediately |
YAM Pools inspects in organised steps and provides a report covering the leak source, its impact and a treatment plan, with a written quotation, in Riyadh and across Saudi Arabia.
Frequently asked questions
When exactly should I request an engineering inspection?
When the pool repeatedly drops more than the bucket in a bucket test, or water loss comes with cracks, hollow tiles or damp around the pool.
Can a small leak become a structural problem?
Yes. Leaking water wets the soil and reaches the steel over time, causing cracks, settlement and corrosion, so a local fix grows into a larger repair.
What should a good inspection report include?
The tests done and their results, the confirmed or likely leak location, photos, an assessment of structural impact and the proposed repair, including whether draining is needed.
Is a higher water bill proof of a leak?
It can be a sign if it coincides with frequent refilling, but it needs confirming with a bucket test and inspection, because usage can rise for other reasons.
