Water tank waterproofing in Aldawadmi: cost & published offers

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

Before we start: what we know about Aldawadmi

Team note on Aldawadmi: 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.. The centre of Aldawadmi sits about 976 m above sea level (SRTM open elevation data).

Main roads in or near Aldawadmi: King Abdulaziz Road, Dawadmi Bujadiyah Road.

Picture a homeowner in Aldawadmi whose rooftop water tank has begun to show damp patches on the ceiling below and a faint stain on the concrete wall. The tank is the family's only reliable supply between deliveries, so the owner wants the leak fixed without emptying the tank for weeks or paying for work that does not match the problem. Their first question is usually what the job will cost and whether the offers they receive are comparable.

The local facts help set expectations. The centre of Aldawadmi sits about 976 m above sea level (SRTM open elevation data), which places the town on higher ground than many nearby areas. For a tank owner, the practical point is that the structure is exposed to sun and temperature swings on the roof, and any coating must cope with that exposure. Published rates give a sense of range: tank internal coating runs SAR 25–60 per m², while liquid roof waterproofing runs SAR 8–25 per m². Because the tank interior and the roof are different surfaces with different demands, an owner should not assume one figure covers both. Crack injection, priced at SAR 40–120 per metre, is often the right choice when the leak comes from a single line of cracking rather than a general failure of the coating.

Work through the job in a clear order. First, drain the tank and inspect the interior and the roof slab, marking every crack and damp area. Second, decide whether the fault is local, such as a crack, or widespread, such as a failed coating across the whole surface; this decides between crack injection and a full tank internal coating. Third, measure the areas you need treated and ask each provider to quote per m² against the same measurements. Fourth, confirm the materials and the surface preparation in writing, since adhesion depends on cleaning and drying the concrete before any coating goes on. Fifth, ask for a curing period before refilling, and test the tank for a day before relying on it. Comparing written quotes on this basis gives you a fair picture of what the repair should cost.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

Signs worth paying attention to

These are the signs most often linked to water tank waterproofing:

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

Causes we see in the field

• Construction joints.
• A common cause: damaged old coating.
• Cracks in the walls or floor.

How we choose the tool in Aldawadmi

From the first visit to the report

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.

Aldawadmi in facts and sources

Short answers for Aldawadmi

Common mistakes we see

• Using a material that is not intended for drinking water

What you receive

You receive: the material name, its batch number and the fill-test result, in a technical report with a verification code.