Water tank waterproofing in Khafji: for companies (annual contract)

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

Why water tank waterproofing differs in Khafji

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.

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).

Water tank waterproofing in Khafji is a common need for companies that rely on rooftop or ground-level storage. The most frequent problem for this property type is leakage through hairline cracks and failed joints in the tank walls and floor, which lets water seep out and can stain or weaken the structure below. Tanks in commercial buildings are often topped up daily, so even a small defect can waste water and cause damage to the surrounding slab over time. A proper inspection usually focuses on finding where water is actually escaping before any coating is chosen.

The local setting shapes how that work is approached. The centre of Khafji sits about 9 m above sea level, and the town is about 2 km from the sea coast. That combination means the site is close enough to the coast for salt-laden air and moisture to be a factor, yet not so low that standing water is a constant concern. Surfaces that are exposed to the weather, and the joints around them, should be checked with this in mind. Crack injection is typically priced per metre, at SAR 40–120 per m, so the length of defects found during inspection has a direct effect on the scope. For the internal lining, tank internal coating is priced at SAR 25–60 per m², while epoxy coating runs at SAR 35–90 per m², and the right choice depends on the condition of the substrate and how the tank is used.

Before the visit, it helps to have a few details ready so the assessment starts efficiently. Tell us the capacity and location of each tank, whether the leak is inside, outside, or both, and how long the problem has been noticed. Let us know whether the tanks are on the roof, at ground level, or partly below ground, since this affects access and the type of waterproofing that suits the structure. Also share any previous repair work, as older coatings can affect adhesion. With this information, the technician can plan the visit, confirm the likely method, and give a clear per-square-metre or per-metre estimate.

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:

• 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 — we check this before anything else.

Tools and methods, and when we use them

The steps in order

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.

Quick comparison: facts and costs in Khafji

Questions from Khafji

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.