Water tank waterproofing for duplexes in Al Wrwd, Riyadh

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

Before we start: what we know about Al Wrwd

The centre of Al Wrwd is at 24.7244, 46.6785, about 1.2 km from the centre of Riyadh, with an approximate radius of 2 km. The approximate area shown on the map is centred here. Main roads in or near Al Wrwd: King Fahd Road, Olaya Street, Al Urubah Road.

The centre of Al Wrwd sits about 631 m above sea level (SRTM open elevation data).

Water tank waterproofing for duplexes in Al Wrwd, Riyadh starts with the location itself. The centre of Al Wrwd is at 24.7244, 46.6785, about 1.2 km from the centre of Riyadh, with an approximate radius of 2 km. Because the area sits close to the city centre, many duplexes here share older infrastructure, so the technician should first confirm the tank's age and whether earlier coatings are still in place. The centre of Al Wrwd sits about 631 m above sea level (SRTM open elevation data), which is a useful reference when discussing how water pressure and rooftop exposure may differ from lower-lying parts of the city.

What is left to the site visit is the detailed condition of the tank itself. The technician will check the internal surfaces for cracks, flaking, or old coating failure, and will look at the joints and inlet and outlet fittings. Measurements of the tank's surface area are taken on site, because the cost of internal work is quoted per square metre, with tank internal coating at SAR 25–65 per m². Crack repair is priced separately per metre at SAR 40–125 per m, so the length of any cracks found will be recorded. The roof and any connected bathroom or basement areas are also inspected on the day, since liquid roof waterproofing (SAR 10–25 per m²), bitumen membrane (SAR 15–35 per m²), and epoxy coating (SAR 35–95 per m²) are each priced by their own area. The final scope depends on what the visit reveals, not on assumptions made from a distance.

To help the technician, residents should have ready the duplex's floor plan or a rough sketch with tank dimensions, the approximate age of the tank, and any records of previous repairs or coatings. Note any visible damp patches, staining on ceilings, or changes in water taste or colour. Clear access to the roof and the tank lid will save time. If the tank was previously lined with insulation, mention it, since XPS boards (SAR 15–30 per m²) may be relevant to the work. Providing these details lets the technician give a fair estimate that reflects the real condition of your tank.

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 Wrwd, 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

Causes we see in the field

• A common cause: construction joints.
• Cracks in the walls or floor.
• Damaged old coating.

How we choose the tool in Al Wrwd

How the work is done, step by step

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 Wrwd in facts and sources

Questions from Al Wrwd

Common mistakes we see

• Using a material that is not intended for drinking water

What you get after the work

The written output: the material name, its batch number and the fill-test result. The report is numbered and can be checked with its verification code.