Water tank waterproofing in Khafji: before buying or handover

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

What is specific about Khafji for water tank waterproofing

The centre of Khafji sits about 9 m above sea level (SRTM open elevation data). Khafji is about 2 km from the sea coast (OpenStreetMap).

Team note on Khafji: 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 Khafji: King Abdullah Road.

Before any tank work starts in Khafji, the first thing to check is where the tank sits relative to the ground and the coast. The centre of Khafji sits about 9 m above sea level (SRTM open elevation data), and the town is about 2 km from the sea coast (OpenStreetMap). Those two facts shape how water moves around a tank here, so a technician will look at the drainage slope, the ground level around the tank walls, and whether surface water pools after rain. A tank that sits low on a site, or one with weak edge sealing near the walls, is a likely place for moisture to get in, so these points are reviewed before any material is chosen.

Several things can only be judged on the day of the site visit. The technician will look at the actual condition of the tank walls, the floor, and the lid, and note any cracks, damp patches, or old coating that has started to lift. The thickness and type of the existing material, the access route for the crew, and whether the tank is full, empty, or partly drained at the time of inspection all affect the scope. Crack lengths are measured on site, because a short hairline crack and a long running crack call for very different work. Prices for the common options, such as tank internal coating at SAR 25–60 per m² and epoxy coating at SAR 35–90 per m², are only meaningful once the true area and condition are known. No quote should be treated as final before the visit.

To help the technician, it is useful to have the following ready: the tank's approximate size and shape, the year it was built or last treated, any past repairs or leak history, and whether the water in it is drinking water, which affects the choice of coating. Photographs of the tank interior, the lid, and the area around the walls are helpful, as are notes on when leaks appear, such as after rain or only when the tank is full. Please also mention the access hatch size and any obstacles near the tank. With this information, the visit can focus on the real problem rather than repeating basic questions, and the scope can be agreed before work begins.

Before buying or taking over a property, an inspection gives you findings in writing before you sign.

Signs worth paying attention to

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

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

Where the problem usually comes from

• A common cause: damaged old coating.
• A common cause: cracks in the walls or floor.
• Construction joints.

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 — Khafji

Short answers for Khafji

What we advise against

• 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.