Water tank waterproofing for duplexes in Hafr Albatin

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

Water tank waterproofing in Hafr Albatin: the local context

The centre of Hafr Albatin sits about 312 m above sea level (SRTM open elevation data). Team note on Hafr Albatin: 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 Hafr Albatin sits about 312 m above sea level, according to SRTM open elevation data. This is a inland city in the northeast of the Kingdom, with a dry climate and a mix of older family duplexes and newer low-rise housing. For a water tank, the practical effect is that most homes rely on rooftop or ground-level storage tanks filled by tanker or network supply, so tanks are often full for long periods and then drawn down quickly. A tank that is emptied and refilled on a regular cycle moves and shrinks, which stresses the joints and wall surfaces. Our waterproofing work for tanks focuses on sealing those joints and the inner wall, since that is where leaks usually start in this setting.

Tank internal coating is priced at SAR 25–60 per m², and this is the most common line of work we carry out for duplex owners. Because the tank is lined with water on every side, the coating must be applied to a clean, sound surface, and any cracks should be treated first. Crack injection, priced at SAR 40–120 per metre, is used where a hairline or structural crack runs through the wall or base and the coating alone would not hold. Where the tank sits on a roof, liquid roof waterproofing at SAR 8–25 per m² and bitumen membrane at SAR 15–35 per m² protect the base from water seeping down into the duplex below. Spray foam at SAR 20–45 per m² and XPS boards at SAR 12–30 per m² are options for insulation and surface protection around the tank base, where temperature swings are a concern.

Owners often avoid the same avoidable problems when they plan this work. The most frequent mistake is coating over a damp or dusty surface, which stops the new layer from bonding and causes it to peel within months. Another is ignoring small cracks because the tank still holds water, when those cracks widen once the tank is drained and refilled. Owners also tend to skip cleaning and draining the tank before inspection, which hides the real condition of the walls. Finally, many people treat the roof base and the tank interior as separate jobs, when a leak from one often shows up in the other. Checking both at the same visit saves time and repeat cost for the household.

In a duplex, the two floors often share lines, so tests are done floor by floor.

Signs worth paying attention to

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 Hafr Albatin

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.

Hafr Albatin in facts and sources

Common questions about water tank waterproofing in Hafr Albatin

What we advise against

• 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.