Water tank waterproofing in Yanbu: before buying or handover

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

Before we start: what we know about Yanbu

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..

Picture a family who has just bought a townhouse in Yanbu, or who is about to take over a unit from a developer. The rooftop water tank looks fine from the outside, but nobody has checked the inside, and the owner is unsure whether the tank was ever coated. Questions like these come up often, and they are easiest to answer before any money changes hands or keys are handed over.

Yanbu's centre sits about 6 m above sea level, and the city is roughly 1.2 km from the coast. For an owner, this means the tank is not far from salty, humid air, which can speed up deterioration of exposed coatings and fixings. Where the tank is installed and how the surrounding roof is finished also matter, so the condition of the tank and its connections deserves a close look rather than a quick glance.

Start by asking the seller or developer for any record of past coating, repair or membrane work on the tank and the roof. Next, inspect the tank interior, if access is possible, for cracks, flaking paint and any sign of old patching. Note where cracks are and how long they run, because crack injection is priced per metre, which helps you judge the scale of any repair. Compare the likely cost of the main options, such as a tank internal coating at SAR 25–60 per m² or an epoxy coating at SAR 35–90 per m², before agreeing to a price. Ask for a written scope showing which products will be used and the area they will cover. Finally, get the work confirmed in writing before handover, so that responsibility for the tank is clear from the first day you live in the property.

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

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

Causes we see in the field

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

How we choose the tool in Yanbu

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.

Facts and costs — Yanbu

Common questions about water tank waterproofing in Yanbu

Common mistakes we see

• Using a material that is not intended for drinking water

What you receive

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.