Water tank waterproofing in Al Yrmwk, Riyadh: for companies (annual contract)

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

Before we start: what we know about Al Yrmwk

The centre of Al Yrmwk is at 24.8085, 46.7835, about 15.2 km from the centre of Riyadh, with an approximate radius of 3.2 km. The service-area circle on the map below is drawn from this point. The centre of Al Yrmwk sits about 598 m above sea level (SRTM open elevation data).

Main roads in or near Al Yrmwk: Dammam Road, Sheikh Jaber Al-Ahmad Al-Sabah Road, Imam Abdullah bin Saud bin Abdulaziz Road.

Al Yrmwk sits at 24.8085, 46.7835, about 15.2 km from the centre of Riyadh, with an approximate radius of 3.2 km. That distance means crews working on water tanks here usually plan a full day around travel and access, and companies should book a site visit early so the tank can be inspected before a quote is fixed. The neighbourhood's compact footprint also helps: a team based nearby can return for follow-up checks without a long drive. The centre of Al Yrmwk sits about 598 m above sea level (SRTM open elevation data), which places it on a rise above much of the city. In practice, this elevation shapes how water pressure and supply behave in the area, so tanks are often filled and drained on a set schedule, and the tank lid, overflow pipe and inlet valve deserve close attention during a waterproofing job.

Pricing for tank work depends on the surface and the defect. Tank internal coating runs SAR 25–65 per m², and this is the core of most tank jobs. Epoxy coating costs SAR 35–95 per m² and suits surfaces that need a harder, smoother finish. Where cracks show, crack injection is charged at SAR 40–125 per metre, so a surveyor should measure every crack before the work is scoped. Bitumen membrane (SAR 15–35 per m²) and XPS boards (SAR 15–30 per m²) are sometimes used on the outside or underside of the structure. Each rate is a range, and the final figure depends on surface condition, access, and the number of coats needed.

Owners in the area avoid several common mistakes. They do not skip surface preparation, because a coating laid over dust, salt deposits or loose paint will peel within a short time. They do not treat cracks as cosmetic; each one is measured and sealed before the tank is coated. They do not fill the tank before the coating has fully cured, and they do not accept a quote that leaves out crack injection when cracks are visible. Finally, they confirm in writing which surfaces are covered, what product is used, and how the tank will be tested before it is returned to service.

For companies, an annual contract sets the scope, the visit schedule and the reports in writing.

When do you need water tank waterproofing?

If you notice one of these signs in Al Yrmwk, 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.

Tools we use in Al Yrmwk

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.

Facts and costs — Al Yrmwk

Questions from Al Yrmwk

Mistakes that cost more

• Using a material that is not intended for drinking water

What you get after the work

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