Water tank waterproofing in Dhahran: with a verifiable technical report

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

Before we start: what we know about Dhahran

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).

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..

Consider a homeowner in Dhahran whose rooftop water tank has begun to show damp patches on the ceiling below, or who notices a faint smell and discolouration in the stored water. The tank sits exposed to the sun and to temperature swings, and the owner wants to know whether the problem is the tank's inner lining, the outer surface, or the roof beneath it. This is a common situation for villa and apartment owners, and it is usually solved by identifying the failing layer before any material is chosen.

The local facts shape the decision. Dhahran's centre sits about 16 m above sea level, so the land is low and flat rather than hilly, which means water drains slowly and standing moisture around the tank base is more likely to stay put. The city is also about 5.9 km from the sea coast, close enough that salt-laden air can affect exposed metal fittings and coatings over time. For a tank, these facts point toward checking drainage around the stand and choosing coatings that tolerate humid, salty conditions. Pricing also varies by method: tank internal coating is quoted at SAR 25–60 per m², liquid roof waterproofing at SAR 8–25 per m², and bitumen membrane at SAR 15–35 per m², so the owner should understand which layer needs work before comparing quotes.

Practical steps follow in order. First, empty the tank and inspect the inside for cracks, flaking, and biofilm, and check the outside and the roof slab beneath for staining or hairline cracks. Second, if the inner lining is failing, clean and dry the surface fully before applying a tank internal coating, since moisture trapped under a new layer causes early failure. Third, where the roof is the source, repair cracks first using crack injection, quoted at SAR 40–120 per metre, then apply liquid roof waterproofing or a bitumen membrane over the cleaned slab. Fourth, check that the tank stand and surrounding drainage direct water away from the base. Finally, keep a record of the materials used and the date of work so future inspections can compare conditions.

Each job ends with a written report that carries a verification code you can check on our site.

When do you need water tank waterproofing?

The following signs are worth checking before they grow:

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

Where the problem usually comes from

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

Tools we use in Dhahran

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.

Facts and costs — Dhahran

Short answers for Dhahran

What we advise against

• Using a material that is not intended for drinking water

What you get after the work

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.