Water tank waterproofing for warehouses in Aljumum

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

Water tank waterproofing in Aljumum: the local context

Team note on Aljumum: 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.. The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data).

Picture a warehouse owner in Aljumum who has stored goods on the ground floor for years. One morning the storekeeper reports damp patches along the base of a wall and a faint smell near the water tank on the roof. The owner wants to know whether the tank and the building are sound, and what it will cost to fix before stock is lost. Most owners in this position are not engineers, and they want a clear plan rather than a sales pitch.

The centre of Aljumum sits about 200 m above sea level, according to SRTM open elevation data. For a warehouse owner, that height matters less as a source of rainfall than as a reminder that the land is not flat, so water can run toward low points and pool against walls and foundations. Tanks on the roof are exposed to sun and heat, which stresses joints and coatings over time. Anyone planning waterproofing should treat the roof tank, the roof surface and any below-ground walls as one connected system, because a leak in one part often shows up as damage in another.

Start by inspecting the tank and the roof together. Empty the tank, clean the internal surface and look for cracks, flaking or failed joints. Mark every crack before work begins. Next, decide which surfaces need treatment: tank internal coating is usually priced at SAR 25–60 per m², while liquid roof waterproofing typically runs SAR 8–25 per m², and bitumen membrane SAR 15–35 per m². Where a wall shows a crack, crack injection is priced at SAR 40–120 per metre. If a basement or below-ground wall is affected, basement waterproofing is SAR 50–150 per m², and XPS boards at SAR 12–30 per m² can help protect the outer face. Get written quotes that state the area or length measured, so you can compare them fairly. Finally, allow the coating to cure fully before refilling the tank and returning stock to the affected space.

For warehouses, work is phased around operations and stored goods.

When do you need 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.
• Damaged old coating — we check this before anything else.
• Construction joints — we check this before anything else.

Tools we use in Aljumum

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.

Facts and costs — Aljumum

Questions from Aljumum

What we advise against

• Using a material that is not intended for drinking water

What you receive

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.