Water tank waterproofing for schools in Yanbu

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

Water tank waterproofing in Yanbu: the local context

Yanbu is about 1.2 km from the sea coast (OpenStreetMap). The centre of Yanbu sits about 6 m above sea level (SRTM open elevation data).

Main roads in or near Yanbu: King Abdulaziz Road, Umluj Road, Al Hanan Street. Team note on Yanbu: 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..

Yanbu is a coastal city, and the first thing a technician checks for a school water tank is how close the site sits to the sea. The centre of Yanbu sits about 6 m above sea level, and the city is about 1.2 km from the sea coast. Both facts matter because salt-laden air and ground conditions near the coast can speed up wear on coatings and tank surfaces, so the inspection starts with the tank's exposure rather than with a fixed product choice. This is also why the team looks first at the outer walls and roof of the tank, where sea air reaches most directly, before moving to the interior.

Several points can only be settled on the day of the site visit. The technician needs to see the actual tank material, its age, the condition of existing paint or coating, and whether cracks or past repairs are present. Access matters too, since a tank on a school roof or in a plant area may limit how long work can run during term time. Pricing is also confirmed on site, because the ranges for tank internal coating (SAR 25–60 per m²), crack injection (SAR 40–120 per metre) and liquid roof waterproofing (SAR 8–25 per m²) depend on the measured area and the condition found. The technician will also check whether the tank's roof needs a bitumen membrane (SAR 15–35 per m²) or a different system altogether.

Useful information for the technician includes the tank's dimensions, its location on the site, the water use pattern of the school, and any records of past leaks or repairs. Knowing whether the tank holds drinking water matters, because it affects the coating choice and the curing time before refilling. Staff should also say which parts of the school are in daily use nearby, so work can be planned around pupils. A short note on any visible staining, damp patches or flaking helps the technician prepare the right materials and equipment before arriving, which reduces delay on the day.

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

Signs worth paying attention to

If you notice one of these signs in Yanbu, it is a good moment to talk to the team:

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

Where the problem usually comes from

• Cracks in the walls or floor — we check this before anything else.
• A common cause: damaged old coating.
• Construction joints.

Tools and methods, and when we use them

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.

Quick comparison: facts and costs in Yanbu

Short answers for Yanbu

Common mistakes we see

• 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.