Water tank waterproofing in Jubail: when to call a technician

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

Before we start: what we know about Jubail

The centre of Jubail sits about 4 m above sea level (SRTM open elevation data). Jubail is about 0.9 km from the sea coast (OpenStreetMap).

Team note on Jubail: 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..

Water tanks in Jubail are most often called in for leaks at the seams and joints, where the tank wall meets the base or where old coating has begun to peel. Staining on the outside of the tank, damp patches on the roof slab beneath it, or a drop in pressure that does not match usage are the usual first signs. Because the tank sits on a roof, a small leak can travel into the building structure before it shows inside a room, so early inspection is worth more than waiting for visible damage.

Jubail sits about 4 m above sea level, and its centre is about 0.9 km from the sea coast. That combination means the air carries salt and moisture, and the ground and roof surfaces are exposed to it year-round. Salt-laden air speeds the breakdown of coatings and sealants, so a technician will usually look more closely at the condition of the tank's outer surfaces and the roof area under it than they would inland. When the approach is discussed, the choice of material matters: an internal tank coating is priced at SAR 25–60 per m², epoxy coating at SAR 35–90 per m², and liquid roof waterproofing at SAR 8–25 per m². A sensible plan matches the material to the exposed surface rather than applying one product everywhere.

Before the visit, ask the technician to measure the tank and the roof area beneath it so the quote is based on real surface figures, and ask which rates apply to each part of the job. Confirm whether the inspection will check for cracks that may need injection, which is priced at SAR 40–120 per metre. Ask what preparation the tank needs, whether the water must be drained, and how long the tank will be out of use. Finally, ask how the work will be checked afterwards and what the technician will do if the first repair does not hold.

Some signs can be watched for a few days; others need a technician straight away — the signs list above helps you decide.

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

The most common causes

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

Tools we use in Jubail

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 Jubail

Common questions about water tank waterproofing in Jubail

Mistakes that cost more

• Using a material that is not intended for drinking water

The written outputs

You receive: the material name, its batch number and the fill-test result, in a technical report with a verification code.