Water tank waterproofing for duplexes in Al Aard, Riyadh

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

Water tank waterproofing in Al Aard: the local context

The centre of Al Aard is at 24.8935, 46.6060, about 21.2 km from the centre of Riyadh, with an approximate radius of 8 km. The approximate area shown on the map is centred here. Main roads in or near Al Aard: King Fahd Road, King Abdulaziz Road, Abu Bakr Al Siddiq Road.

The centre of Al Aard sits about 671 m above sea level (SRTM open elevation data). The nearest wadi channel is about 1 km from the centre of Al Aard (OpenStreetMap).

Water tank waterproofing in Al Aard, Riyadh starts with the setting itself. The centre of Al Aard sits at 24.8935, 46.6060, about 21.2 km from the centre of Riyadh, with an approximate radius of 8 km, so duplex properties here are spread across a wider area than many central districts. The centre of Al Aard sits about 671 m above sea level (SRTM open elevation data), which means the technician should expect the site to be on a rise with its own drainage pattern. The nearest wadi channel is about 1 km from the centre of Al Aard (OpenStreetMap), so storm runoff from the surrounding land is a real consideration. For that reason, the first checks on a duplex tank are the tank's external condition, the state of its lid and inlet, and any signs of seepage at the base or walls, before any coating is discussed.

Several things are left to the site visit. The technician needs to see the tank in person to judge the condition of its concrete, whether cracks are active or old, and how much surface preparation is needed. The choice between an internal tank coating and other systems depends on the tank's size, its access, and whether it holds potable water, so that decision is made on the day. Pricing for the work is set by the measured area and the method chosen, using the ranges that apply to each item. Tank internal coating is SAR 25–65 per m², while crack injection is SAR 40–125 per metre, so the number of cracks and their length will shape the quote. Where a tank sits against a basement or bathroom wall, the nearby waterproofing may also need attention, and that is confirmed only once the building is inspected.

To help the technician prepare, it is useful to have a few details ready before the visit. Note the approximate capacity of the tank, whether it is roof-mounted or ground-level, and when it was last cleaned or treated. Mention any previous repairs, leaks in adjacent rooms, or staining on the duplex walls. Describe whether the roof has existing liquid waterproofing or a bitumen membrane, since those affect how the tank and roof work is sequenced. Clear access to the tank, its lid and the stairs or roof route will let the visit focus on assessment rather than setup.

In a duplex, the two floors often share lines, so tests are done floor by floor.

Signs worth paying attention to

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

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

Where the problem usually comes from

• Construction joints.
• Damaged old coating.
• A common cause: cracks in the walls or floor.

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.

Al Aard in facts and sources

Short answers for Al Aard

Mistakes that cost more

• 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.