Water tank waterproofing in Alrass: with a verifiable technical report

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

Water tank waterproofing in Alrass: the local context

Team note on Alrass: 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.. Main roads in or near Alrass: King Abdulaziz Road, King Fahd Road, King Salman Road.

The centre of Alrass sits about 695 m above sea level (SRTM open elevation data).

The most common problem with water tanks in Alrass is slow seepage through hairline cracks and failed joints in the concrete walls and base, which often shows up as damp patches on the outside or a gradual drop in water quality. Because the tank holds water constantly, even a small defect can keep the surrounding concrete wet and encourage corrosion of any steel reinforcement. Before any work starts, the walls and floor should be cleaned, opened where needed, and checked for active leaks, since coatings applied over moving or wet surfaces tend to peel quickly.

Local conditions shape the approach. The centre of Alrass sits about 695 m above sea level, so the surrounding terrain and drainage patterns differ from low coastal areas, and rainwater runoff from rooftops and open ground should be directed away from tank walls rather than allowed to pool against them. For tank interiors, an epoxy or cementitious internal coating is usually the starting point, with tank internal coating priced at SAR 25–60 per m² and epoxy coating at SAR 35–90 per m². Where cracks are visible, crack injection at SAR 40–120 per m is typically needed before any surface layer goes on, so that the repair seals the defect instead of just covering it. Tanks sitting on roofs or exposed slabs need a different treatment, and liquid roof waterproofing at SAR 8–25 per m² or a bitumen membrane at SAR 15–35 per m² may suit those surfaces better.

Before the visit, ask the provider to explain how they will locate the source of the leak rather than only coating the visible surface, and ask which product they plan to use and why it suits this tank's material and exposure. Request a written breakdown that separates crack injection, surface coating and any insulation such as XPS boards, which cost SAR 12–30 per m², so you can compare the scope line by line. Ask how long the tank must stay empty for curing and how it will be refilled safely. A clear, itemised quote and a straightforward explanation of the method are better signs of a sound job than any promise of perfect results.

Each job ends with a written report that carries a verification code you can check on our site.

When do you need water tank waterproofing?

These are the signs most often linked to water tank waterproofing:

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

Where the problem usually comes from

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

Tools and methods, and when we use them

From the first visit to the report

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 — Alrass

Questions from Alrass

Common mistakes we see

• 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.