Water tank waterproofing for residential buildings in Dhahran

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

Before we start: what we know about Dhahran

Team note on Dhahran: 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.. The centre of Dhahran sits about 16 m above sea level (SRTM open elevation data).

Dhahran is about 5.9 km from the sea coast (OpenStreetMap).

Dhahran sits about 16 m above sea level, and its centre is roughly 5.9 km from the coast, so the first thing a technician checks on a tank job is how exposed the tank is to the damp, salt-laden air that moves in from the Gulf. Rooftop and open-air tanks take the brunt of daily heat and wind-driven moisture, so the surface prep, any cracks, and the condition of old coating are inspected before anything is quoted. Costs are shown as ranges, so the first visit is also where the scope is fixed. Tank internal coating is priced at SAR 25–60 per m², and crack injection at SAR 40–120 per metre, so measuring the internal surface and mapping every crack early keeps the estimate honest.

Some points can only be settled on site. The technician needs to see the tank walls, floor, and inlet and outlet fittings in person, to judge whether the existing layer is sound or must be stripped back. Access to the tank, the water level on the day, and whether the building is occupied all affect how the work is sequenced. The choice between an epoxy coating (SAR 35–90 per m²), a spray foam (SAR 20–45 per m²), or a liquid roof system (SAR 8–25 per m²) depends on the tank's material, its position, and what sits underneath it. Those decisions are made once the surface has been looked at directly.

To help the technician, the owner or building manager should have ready the tank's approximate size and material, any previous repair records, the date the tank was last drained, and a note of any leaks noticed inside the building. Clear access to the roof and a plan of the tank location are useful, as is confirmation of which party handles water supply interruption during the work. With this information in hand, the site visit can move quickly to measurement and a clear written scope.

For a residential building, shared risers, tanks and pumps are checked as one system.

Signs that call for water tank waterproofing

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

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

Causes we see in the field

• Construction joints.
• Damaged old coating.
• Cracks in the walls or floor — we check this before anything else.

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.

Quick comparison: facts and costs in Dhahran

Short answers for Dhahran

Mistakes that cost more

• Using a material that is not intended for drinking water

What you get after the work

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