Water tank waterproofing in Ahad Almasarihah: cost & published offers

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

What is specific about Ahad Almasarihah for water tank waterproofing

The centre of Ahad Almasarihah sits about 667 m above sea level (SRTM open elevation data). Team note on Ahad Almasarihah: 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 most common problem with water tank waterproofing is slow seepage through hairline cracks and failed joints in the tank walls and floor, which lets water reach the structure and causes staining, odour and flaking coatings over time. For this service, the usual first step is to find where the leak starts, because repairing only the visible wet patch often leaves the source untouched. A tank that has been drained, cleaned and inspected gives the installer a clear surface to work on, and the choice between crack injection, internal coating and a new membrane depends on what the inspection finds.

Ahad Almasarihah sits at elevation about 667 m above sea level, and the centre of the town is recorded at that height in SRTM open elevation data. That altitude matters for planning because the local setting is different from low coastal areas, so the installer should assess the tank and its exposure on site rather than apply a generic approach. Published rates for the work range from SAR 25–60 per m² for tank internal coating, SAR 40–120 per metre for crack injection, and SAR 35–90 per m² for epoxy coating, so the scope of the job decides which line applies. Rooftop water tanks in particular may also need liquid roof waterproofing at SAR 8–25 per m², or a bitumen membrane at SAR 15–35 per m², where the tank sits on a roof slab.

Before the visit, ask the provider to confirm which of these methods they propose and why, and to measure the tank so the quote is based on real square metres and metres of crack rather than estimates. Ask whether the price includes draining, surface preparation and cleaning, and whether they will inspect the inside of the tank before recommending a coating. Ask how long the work will take and whether the tank must stay empty during curing. Request a written quote that lists each item against the published range, so you can compare the final figure with the rates above and understand exactly what you are paying for.

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

When do you need water tank waterproofing?

If you notice one of these signs in Ahad Almasarihah, 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

Where the problem usually comes from

• Damaged old coating — we check this before anything else.
• A common cause: cracks in the walls or floor.
• A common cause: construction joints.

Tools and methods, and when we use them

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 — Ahad Almasarihah

Questions from Ahad Almasarihah

What we advise against

• 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.