Water tank waterproofing for apartments in Jubail

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

Before we start: what we know about Jubail

The centre of Jubail sits about 4 m above sea level (SRTM open elevation data). Jubail is about 0.9 km from the sea coast (OpenStreetMap).

Team note on Jubail: Kashf teams serve this city and its nearby districts with the same documented inspection standard: device-based leak detection without demolition, a written report, and a clear scope before any work begins..

Is a water tank in a Jubail apartment block worth waterproofing, and how do you know it needs it? Jubail sits about 4 m above sea level, and the coast is only about 0.9 km away, so the air carries salt and humidity that can work on concrete and coatings over the years. For an owner, the question usually comes down to whether the tank is leaking, seeping, or simply ageing. A tank that is sound inside but shows staining, flaking paint or damp patches on the walls around it may only need a protective layer, while cracks or persistent wetness point toward a more involved repair. Tank internal coating is priced at SAR 25–60 per m², and crack injection at SAR 40–120 per metre, so the scope of the work depends on what the inspection finds rather than on a single fixed rate.

The visit begins with a walk around the tank and the roof area above it, looking for visible cracks, damp edges and any signs that water is getting through the structure. The technician will measure the exposed surfaces so the area can be quoted per square metre, and will note the length of any cracks, since crack injection is priced per metre. Where the tank is accessible from inside, the inner walls and floor are checked for blistering, loose material or water marks. The findings are then matched to the most suitable treatment, whether that is an epoxy coating, a spray foam layer, or injection of the cracks before a coating is applied. Where the problem lies in the roof above the tank, liquid roof waterproofing at SAR 8–25 per m² or a bitumen membrane at SAR 15–35 per m² may be recommended instead.

Before the visit, it helps to have the tank's access route clear and the water level as low as the building's supply allows, so the surfaces can be seen properly. Note any past leaks, the date of the last repair, and the rooms or walls where damp has appeared, since these details guide the inspection. If the tank sits beneath a bathroom or within a basement area, let the technician know, because bathroom waterproofing runs at SAR 15–40 per m² and basement work at SAR 50–150 per m², and those areas may need to be assessed together. Having this information ready lets the visit focus on the real problem and makes the resulting quote easier to compare.

In an apartment, a problem may start in your unit or in a shared line; we separate the two before any work.

When do you need water tank waterproofing?

If you notice one of these signs in Jubail, 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

Where the problem usually comes from

• A common cause: damaged old coating.
• A common cause: cracks in the walls or floor.
• A common cause: construction joints.

Tools and methods, and when we use them

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.

Jubail in facts and sources

Short answers for Jubail

Common mistakes we see

• Using a material that is not intended for drinking water

The written outputs

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.