Water tank waterproofing in Alzulfi: with a verifiable technical report

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

Why water tank waterproofing differs in Alzulfi

The centre of Alzulfi sits about 615 m above sea level (SRTM open elevation data). Main roads in or near Alzulfi: King Fahd Road, Sheikh Ibn Baz Square, King Salman Road.

Team note on Alzulfi: Kashf teams serve this city and its nearby districts with the same documented inspection standard: device-based leak detection without demolition, a written report, and a clear scope before any work begins..

Does a water tank in Alzulfi really need waterproofing, and how would anyone know it is leaking? Alzulfi sits at a high point, with the centre about 615 m above sea level (SRTM open elevation data), so many homes rely on rooftop or ground-level tanks that are filled by pumping and then drawn down over time. Concrete tanks can develop hairline cracks and seam failures, and water loss may not be obvious until a pump runs more often than usual or damp patches appear on nearby walls. Tank internal coating is priced at SAR 25–60 per m², which is one of the most common requests for this kind of job, while crack injection is charged at SAR 40–120 per metre when the damage is limited to a defined line.

The inspection usually starts with a dry look at the tank: the walls, floor, corners and any pipe penetrations are checked for cracks, flaking render, and staining. The area of the interior surface is measured in square metres so that a proper price can be set against the rates above. Where a crack runs through the structure, its length is recorded in metres, and the inspector notes whether the tank is fully empty or still holds water. Roof or exterior elements connected to the tank may also be checked, since liquid roof waterproofing is charged at SAR 8–25 per m² and bitumen membrane at SAR 15–35 per m², and the two systems are often considered together. The result is a written scope that lists each treatment, its unit and its rate range, rather than a single lump figure.

Before the visit, it helps to empty the tank as far as practical and to clear access to the lid, ladder and the surfaces around it. Note when you first saw a drop in level, any pump noise changes, and where you have seen damp marks. Have the tank's approximate dimensions ready, and check whether the roof or basement nearby has also shown signs of moisture, because these areas can be quoted together. Keep a record of any earlier repairs and what materials were used, as this affects how the new coating should be prepared. With this information on hand, the inspector can give you a clearer scope and a realistic range of costs before any work begins.

Each job ends with a written report that carries a verification code you can check on our site.

Signs worth paying attention to

If you notice one of these signs in Alzulfi, it is a good moment to talk to the team:

• A tank that leaks after testing
• Deposits and flaking inside the tank
• Unusual colour or taste in the water

Causes we see in the field

• Damaged old coating.
• Cracks in the walls or floor.
• A common cause: construction joints.

How we choose the tool in Alzulfi

The steps in order

1. Emptying and ventilation: The tank is emptied and ventilated before entry.
2. Cleaning and preparation: Loose material is removed down to a sound surface.
3. Crack treatment: Active cracks are treated first.
4. Coating layers: A material intended for drinking-water tanks is applied.
5. Disinfection and fill test: The tank is disinfected and the level is monitored after filling.

Facts and costs — Alzulfi

Questions from Alzulfi

What we advise against

• Using a material that is not intended for drinking water

The written outputs

The written output: the material name, its batch number and the fill-test result. The report is numbered and can be checked with its verification code.