Water tank waterproofing for offices & commercial complexes in Dumat Aljandal

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

Water tank waterproofing in Dumat Aljandal: the local context

Team note on Dumat Aljandal: 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 Dumat Aljandal sits about 601 m above sea level (SRTM open elevation data).

Water tanks on office and commercial roofs in Dumat Aljandal usually fail first at the joints and the floor-to-wall junction, where years of cycling water levels open hairline cracks and where the coating has lifted or worn thin. Leaks there often go unnoticed until stains appear on ceilings below or the water tastes off, so the most common request we see is for a tank that is still structurally sound but no longer holds water reliably. For this property type, the goal is to restore a continuous, sealed inner skin rather than simply patch the visible spot.

The local setting matters. The centre of Dumat Aljandal sits about 601 m above sea level (SRTM open elevation data), so buildings here sit at a height where rooftop tanks are exposed to strong sun, heat and sharp day-to-night temperature swings. That constant expansion and contraction is what drives cracking in concrete and in older coatings. Because of this, the approach usually starts with crack injection and a full internal tank coating, which is priced at SAR 25–60 per m² for tank internal coating. Where roof surfaces above the tank are also leaking, liquid roof waterproofing at SAR 8–25 per m² or bitumen membrane at SAR 15–35 per m² may be considered alongside the tank work, and each option suits different roof conditions.

Before the visit, ask the provider to confirm the tank's material, its approximate capacity, and whether the leak is inside the tank, through its walls, or from the roof above. Ask whether the quote covers surface preparation and crack injection, which is charged separately at SAR 40–120 per metre, and how the work will be done without emptying the building's water supply for long. Request a written breakdown by square metre and by metre of crack so you can compare quotes on the same basis. A clear site inspection should come before any price is agreed.

For offices and commercial complexes, work is scheduled to avoid disrupting staff and visitors.

Signs that call for water tank waterproofing

If you notice one of these signs in Dumat Aljandal, it is a good moment to talk to the team:

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

Where the problem usually comes from

• Cracks in the walls or floor — we check this before anything else.
• Damaged old coating.
• Construction joints.

How we choose the tool in Dumat Aljandal

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.

Facts and costs — Dumat Aljandal

Common questions about water tank waterproofing in Dumat Aljandal

Mistakes that cost more

• 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.