Water tank waterproofing for duplexes in Al Yrmwk, Riyadh

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

Water tank waterproofing in Al Yrmwk: the local context

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 approximate area shown on the map is centred here. Main roads in or near Al Yrmwk: Dammam Road, Sheikh Jaber Al-Ahmad Al-Sabah Road, Imam Abdullah bin Saud bin Abdulaziz Road.

The centre of Al Yrmwk sits about 598 m above sea level (SRTM open elevation data).

Water tank waterproofing for duplexes in Al Yrmwk usually begins with the same problem: a rooftop or ground-level tank that has been left to crack, flake, or seep over several years of heat and use. For a duplex, a leaking tank does not just waste water. It can soak into the shared walls and ceilings of both units, so repairs need to be planned around two households rather than one. The most common job we see is internal tank coating, where the lining has lost its grip and water is working through the joints. Tank internal coating is priced at SAR 25–65 per m², and the surface area of a typical duplex tank determines where the job falls in that range.

Al Yrmwk sits at about 598 m above sea level, with its centre at 24.8085, 46.7835, roughly 15.2 km from the centre of Riyadh and within an approximate radius of 3.2 km. That elevation and location matter for planning. Roof and tank surfaces here take strong daytime sun, and the temperature swings between day and night stress coatings and joints. This is why we pay close attention to crack injection, priced at SAR 40–125 per metre, and to liquid roof waterproofing at SAR 10–25 per m², both of which can be applied to the surfaces that sit in full sun. Where the tank shares a wall with a bathroom or sits on a basement slab, the approach changes again, and bathroom waterproofing (SAR 15–40 per m²) or basement waterproofing (SAR 55–160 per m²) may need to be included in the same visit.

Before the visit, ask for the tank's capacity and how old the lining is, and tell the crew which unit the tank serves and whether the leak has reached the ceiling below. Ask whether the quote lists each surface separately, so you can see the cost of the tank interior, roof, and any crack repairs on their own. Confirm whether the price covers the removal of loose old material and whether the crew will test the tank before handover. A clear list of surfaces and per-metre or per-square-metre rates will make it easier to compare quotes and to plan the work around both households in the duplex.

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

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:

• 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 — we check this before anything else.
• A common cause: damaged old coating.

How we choose the tool 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.

Quick comparison: facts and costs in Al Yrmwk

Short answers for Al Yrmwk

What we advise against

• 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.