Water tank waterproofing in Wadi Aldawasir: for companies (annual contract)

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

Why water tank waterproofing differs in Wadi Aldawasir

The centre of Wadi Aldawasir sits about 683 m above sea level (SRTM open elevation data).

A typical scenario for a company that runs a site with a rooftop or ground-level water tank is this: the tank was installed years ago, the owner notices damp patches on a wall or a stain on the ceiling below, and the water supply to the building starts to smell or taste slightly off. Staff want the problem fixed without shutting down operations for long, and the owner wants a clear picture of cost before work starts. The tank is not visible from street level, so the leak often goes unnoticed until it has already reached the structure below.

The Wadi Aldawasir site has its own considerations. The centre of Wadi Aldawasir sits about 683 m above sea level (SRTM open elevation data), so tanks here are often exposed to strong sun and sharp day-night temperature swings, which stress coatings and joints over time. For a company, that means the waterproofing scope should cover more than one element. Tank internal coating (per m²): SAR 25–60 per m² protects the water itself and the tank walls, while liquid roof waterproofing (per m²): SAR 8–25 per m² protects the slab on which the tank sits. Where the tank's base connects to a basement or lower floor, basement waterproofing (per m²): SAR 50–150 per m² may also be relevant. Costs vary with the surface and its condition, so a site assessment comes first.

A sensible order of work starts with inspection. Drain the tank, clean the surfaces, and mark every crack and damp area. Next, repair the cracks, since crack injection (per metre): SAR 40–120 per m is usually needed before any coating will hold. Then choose the system that suits each surface: epoxy coating (per m²): SAR 35–90 per m² for the tank interior, or bitumen membrane (per m²): SAR 15–35 per m² on exposed roof areas. Spray foam (per m²): SAR 20–45 per m² and XPS boards (per m²): SAR 12–30 per m² can serve as insulation where the tank is exposed. Finally, test the tank by refilling it and watching for leaks over a period before returning it to service, and keep a written record of the work for future maintenance.

For companies, an annual contract sets the scope, the visit schedule and the reports in writing.

When do you need water tank waterproofing?

The following signs are worth checking before they grow:

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

Causes we see in the field

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

Wadi Aldawasir in facts and sources

Common questions about water tank waterproofing in Wadi Aldawasir

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.