Underground tank leak detection for residential buildings in Al Izdhar, Riyadh

Prepared by the technical team · editorial review · last updated 13 November 2026 · Sources

Underground tank leak detection in Al Izdhar: the local context

The centre of Al Izdhar is at 24.7803, 46.7175, about 8.6 km from the centre of Riyadh, with an approximate radius of 1.2 km. The approximate area shown on the map is centred here. Main roads in or near Al Izdhar: Northern Ring Road, Eastern Ring Road, Muslima Al Ansari Road.

The centre of Al Izdhar sits about 646 m above sea level (SRTM open elevation data).

Underground water tanks in residential buildings in Al Izdhar most often fail quietly. A slow leak through a cracked wall, a corroded fitting or a failed inlet seal can drain water for weeks before anyone notices a drop in pressure or a damp patch in the car park. Owners usually discover the problem only when the pump runs longer than normal or the monthly water bill rises without explanation. Early checks matter, because a small leak in a concrete tank can undermine the base and the surrounding ground over time.

The local setting shapes how we approach each inspection. Al Izdhar is centred at 24.7803, 46.7175, about 8.6 km from the centre of Riyadh, with an approximate radius of 1.2 km, so most buildings sit within a compact area with similar soil and groundwater conditions. The centre of the district sits about 646 m above sea level, which means tanks here are usually filled and drained under moderate pressure conditions rather than the extreme head found at much lower elevations. We therefore focus first on the tank walls, floor joints and inlet and outlet fittings, where leaks in this type of structure most often start. Where the tank needs internal protection after repairs, the internal coating is priced at SAR 25–70 per m², and the final figure depends on the surface area and condition of the tank.

Before the visit, ask the service provider a few clear questions. Confirm how they will test for leaks, whether by level monitoring, pressure testing or a visual check of accessible surfaces, and ask what they will do if the tank cannot be fully emptied. Ask for a written description of the coating work, including the surface preparation and the materials used, and request a per m² quote based on measured dimensions. Finally, ask who will be on site, how long they expect the inspection to take, and how they will report their findings, so you can compare results and plan any repairs with confidence.

For a whole building, a survey of the shared systems comes before unit-by-unit work.

Signs worth paying attention to

These are the signs most often linked to underground tank leak detection:

• Damp or salt marks on the tiles above the tank
• The tank needs refilling faster than usual
• The pump runs for longer periods
• A noticeable drop in the water level overnight

The most common causes

• Cracks in the concrete tank walls or floor.
• Construction joints and corners — we check this before anything else.
• A float valve that does not close, so water is wasted — we check this before anything else.

How we choose the tool in Al Izdhar

From the first visit to the report

1. Safety first: Tank lids and confined spaces are handled with ventilation and a second person on site.
2. Documented level test: Filling and use are stopped and the level is recorded against time.
3. Isolating the tank from the network: This tells us whether the loss is from the tank body or from the supply line.
4. Checking the body and connections: Inlet, outlet and overflow connections are inspected.
5. Recommendation: You get the next step in writing: repair, waterproofing or a line test.

Facts and costs — Al Izdhar

Questions from Al Izdhar

What we advise against

• Ignoring the float valve
• Waterproofing the tank before confirming the loss is from the tank and not the line

The written outputs

You receive: the written level-test result and the recommended next step, in a technical report with a verification code.