Water tank waterproofing for residential buildings 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 tanks on residential roofs in Al Yrmwk face a common problem: the tank walls and base crack or lose their seal over time, and leaks show up as damp patches in the top-floor ceiling below. Because the tank sits on the building's highest point, any seepage travels down through the structure and is often noticed late. A tank that has been drained and refilled many times, or that sits on a slab with small cracks, is the usual starting point for this kind of job.

Al Yrmwk sits at about 24.8085, 46.7835, roughly 15.2 km from the centre of Riyadh, within an approximate radius of 3.2 km. Its centre is about 598 m above sea level, so the area is at a notably higher elevation than central Riyadh. That altitude is part of why the approach needs care: the tank and roof take direct sun and wide temperature swings, which stress coatings and joints. For this reason, the work usually begins with a close look at the tank's internal surface and the slab beneath it, and treatment is chosen to suit what is found. Options include tank internal coating at SAR 25–65 per m², crack injection at SAR 40–125 per metre, and liquid roof waterproofing at SAR 10–25 per m² for the slab around the tank.

Before booking a visit, ask the provider to confirm the tank's size and material, when it was last treated, and whether the leak is inside the tank or in the roof slab below, since the two need different work. Ask for a written quote that lists each item by unit price, such as per m² for coating and per metre for crack injection, so you can compare it against the ranges above. Also ask which products they plan to use, how long the surface must stay empty for curing, and whether the work includes a check of the overflow and inlet fittings. A clear answer to these questions will show whether the proposed plan fits your building.

For a residential building, shared risers, tanks and pumps are checked as one system.

Signs that call for water tank waterproofing

The following signs are worth checking before they grow:

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

Causes we see in the field

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

Tools we use in Al Yrmwk

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 Yrmwk in facts and sources

Common questions about water tank waterproofing in Al Yrmwk

What we advise against

• 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.