Water tank waterproofing in Qatif: preventive periodic check

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

Before we start: what we know about Qatif

Team note on Qatif: 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.. Qatif is about 2.5 km from the sea coast (OpenStreetMap).

The centre of Qatif sits about 5 m above sea level (SRTM open elevation data).

Water tanks on rooftops in Qatif are the common case here, and the most frequent problem is slow leakage through the tank's internal walls and floor joints, which often goes unnoticed until the water tastes different or a damp patch shows on the ceiling below. Because the tank sits open to the sun and to the temperature swings of the day, the coating and the joints tend to crack over time. A preventive periodic check looks for hairline cracks, lifting coating, and failing sealant at the corners before they turn into a leak that needs major repair.

Local conditions shape the approach. The centre of Qatif sits about 5 m above sea level, and the town is about 2.5 km from the sea coast. Those two facts matter for water tanks and the buildings they sit on. Sea air carries salt and moisture, so a tank and its fittings can corrode or degrade faster than the same tank would inland, and the inspection should pay attention to metal supports, fixings and any exposed surfaces. Because the land is low and close to the sea, moisture in the ground and the surrounding structure also deserves a look, particularly where a tank is set near a wall or a basement.

Before booking a visit, ask the provider what the check covers: whether it includes the tank's internal coating and floor joints, the roof area beneath the tank, and the fittings at the inlet and outlet. Ask whether they will mark and photograph any cracks they find and explain which repair method they propose for each, such as crack injection, a tank internal coating, or a liquid roof waterproofing layer. Ask for the price basis in writing, since internal coating is quoted per square metre and crack injection per metre, so the quote should show the measured area and length. Finally, ask how they will confirm the tank is safe for drinking water once the work is finished.

Preventive checks follow a written schedule instead of waiting for a fault.

Signs worth paying attention to

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

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

The most common causes

• A common cause: construction joints.
• A common cause: cracks in the walls or floor.
• Damaged old coating.

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.

Qatif in facts and sources

Common questions about water tank waterproofing in Qatif

Common mistakes we see

• Using a material that is not intended for drinking water

The written outputs

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.