Water tank waterproofing in Aldiriyah: emergency

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

Before we start: what we know about Aldiriyah

The centre of Aldiriyah sits about 655 m above sea level (SRTM open elevation data). Team note on Aldiriyah: 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 Aldiriyah sits about 655 m above sea level, according to SRTM open elevation data. For a water tank in this part of Riyadh, that height matters. Tanks on roofs and upper floors are exposed to strong sun and wide temperature swings between day and night, and these cycles stress coatings and joints over time. A technician arriving for an emergency call will therefore check the tank's surface temperature, look for hairline cracks that open and close with heat, and select a flexible system rather than a rigid one.

Because the area is built up with a mix of older and newer buildings, the working conditions vary from site to site. The service approach changes with the tank's position and condition. For an internal tank coating, the price typically falls in the range of SAR 25–60 per m², and the work is scheduled so the tank can be drained, cleaned and dried properly before coating. For roof waterproofing, a liquid system costs SAR 8–25 per m², while a bitumen membrane costs SAR 15–35 per m², and the choice depends on the roof's slope, its access and how much heat it must withstand. Where cracks are the source of a leak, crack injection is priced at SAR 40–120 per metre, and this is often the fastest way to stop an active leak before a full recoating.

Owners often make the same avoidable mistakes during an emergency. The first is waiting for a visible leak before acting, when a damp patch or a drop in pressure may already show that water is getting through. The second is applying a cheap surface sealant over a cracked or dusty base, which peels off within a short time. The third is choosing the lowest quote without asking which material is being used, since epoxy coating at SAR 35–90 per m² and spray foam at SAR 20–45 per m² behave differently. Clear questions about the surface preparation, the drying time and the warranty terms help avoid these problems before the work begins.

If water is flowing, close the main valve first, then call or message with photos.

When do you need water tank waterproofing?

If you notice one of these signs in Aldiriyah, 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

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

How we choose the tool in Aldiriyah

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.

Quick comparison: facts and costs in Aldiriyah

Questions from Aldiriyah

What we advise against

• 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.