Water tank waterproofing for schools in Khobar

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

Why water tank waterproofing differs in Khobar

Team note on Khobar: 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 Khobar sits about 9 m above sea level (SRTM open elevation data).

Khobar is about 1.8 km from the sea coast (OpenStreetMap).

Before any coating goes on a school water tank in Khobar, the first thing to check is where the building sits, because that shapes how moisture behaves around the tank. The centre of Khobar sits about 9 m above sea level, and the city is about 1.8 km from the sea coast. Both facts matter here. Coastal air carries salt and humidity, and salt can work into concrete and undermine a coating if the surface is not prepared properly. Being only 9 m above sea level also means groundwater and rising damp can be close to the foundations, so the technician should look at how the tank sits relative to the ground and any water-bearing layers beneath it.

Several things can only be judged on the day. The condition of the tank walls, the floor, and the joints needs to be inspected by hand and by eye, including any hairline cracks, the state of the existing internal lining, and whether the tank is holding water now. The technician will need to measure the surface area and decide whether the damage is confined to a few cracks, which may need crack injection at a rate per metre, or spread across the whole inner surface, which points toward a full tank internal coating priced per square metre. Access, the water level during work, and how the school can be kept running while the tank is drained also depend on the site visit and cannot be settled from a desk.

For the technician, the practical points are these. Ask the school for the tank's dimensions, its age, and any previous repair records, since these help estimate the area to be covered. Note whether the tank is in a basement, on a roof, or at ground level, because basement waterproofing, roof coatings, and bitumen membranes are priced separately and each needs different preparation. Check for chlorine or other additives in the stored water, which affects the choice of internal coating. Where insulation is considered for the tank's outer walls, XPS boards are priced separately per square metre. Record every crack, its length in metres, and photographs, so the quote reflects the real scope and the school understands the work before it starts.

For schools, the larger jobs are planned for weekends and holidays.

Signs that call for water tank waterproofing

The following signs are worth checking before they grow:

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

Causes we see in the field

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

Tools we use in Khobar

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 — Khobar

Common questions about water tank waterproofing in Khobar

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.