Water tank waterproofing for schools in Ahad Almasarihah

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

Why water tank waterproofing differs in Ahad Almasarihah

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 centre of Ahad Almasarihah sits about 667 m above sea level (SRTM open elevation data).

The first thing checked at a school water tank in Ahad Almasarihah is the tank's position and exposure, because the centre of the town sits about 667 m above sea level according to SRTM open elevation data. At that altitude the site is set on higher ground, so rooftop and elevated tanks are exposed to strong sun, wide daily temperature swings and wind-driven rain. These conditions stress coatings and joints more quickly than in low-lying areas, which is why the assessment starts with the tank's height, its access and how fully the surfaces can be seen before any price is discussed.

What is left to the site visit is the actual condition of the tank, which cannot be judged from a description. The technician will look for cracks and where they run, check whether the tank is a concrete, steel or plastic structure, and decide whether the work is a crack injection or a wider surface treatment. Costs for the main options are listed for reference: crack injection runs SAR 40–120 per metre, tank internal coating SAR 25–60 per m², epoxy coating SAR 35–90 per m², and spray foam SAR 20–45 per m². Which of these applies, and how much area is involved, depends on what the technician finds once the tank is open and dry.

Information that helps the technician includes the size of the tank and the area of its roof and any basement or plant-room walls, measured in square metres, along with the length of visible cracks in metres. It is also useful to know whether the school has recently had leaks in bathrooms, which are costed at SAR 15–40 per m², or on the roof, where liquid roof waterproofing is SAR 8–25 per m² and bitumen membrane SAR 15–35 per m². Noting the age of any previous coating, and whether the tank is in use during term time, lets the technician plan the work around the school day and choose a system that suits the tank material.

For schools, the larger jobs are planned for weekends and holidays.

Signs worth paying attention to

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

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

Where the problem usually comes from

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

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.

Ahad Almasarihah in facts and sources

Questions from Ahad Almasarihah

Common mistakes we see

• Using a material that is not intended for drinking water

The written outputs

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