Water tank waterproofing in Qatif: cost & published offers

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).

In Qatif, the first thing to check on a water tank is how close the site sits to the coast, because salt-laden air and groundwater affect the surfaces and the choice of coating. The centre of Qatif sits about 5 m above sea level (SRTM open elevation data), and the town is about 2.5 km from the sea coast (OpenStreetMap). These facts mean that many tanks are set in relatively low, damp ground where moisture can work up through the base and salts can accumulate on the outside walls, so the technician looks at the substrate and any signs of efflorescence before recommending a system.

The rest is left to the site visit. The technician must confirm the tank's material, its size, whether it is above or below ground, the condition of existing seals and any cracks, and whether old coatings are still bonded or have begun to lift. Access, the water quality the tank holds, and whether the tank is in use during work all change the approach. Published offers give a general picture of what work can cost, but the final scope can only be set once the surfaces have been measured and inspected in person. Published rates cover, for example, tank internal coating at SAR 25–60 per m², epoxy coating at SAR 35–90 per m², and crack injection at SAR 40–120 per metre, while bitumen membrane runs at SAR 15–35 per m² and XPS boards at SAR 12–30 per m².

To help the technician, the homeowner or manager should have the tank's approximate internal and external dimensions ready, note when leaks were first seen and where they appear, and share any previous repair records. Clear access to the tank lid and surrounding area speeds up the visit. Photographs of cracks, staining and damp patches are useful, and information on whether drinking water is stored, since this affects the choice of coating and how the tank must be cleaned and rinsed afterwards.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

Signs worth paying attention to

The following signs are worth checking before they grow:

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

Causes we see in the field

• A common cause: construction joints.
• A common cause: cracks in the walls or floor.
• Damaged old coating — we check this before anything else.

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.

Facts and costs — Qatif

Common questions about water tank waterproofing in Qatif

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.