Water tank waterproofing for duplexes in Alqunfudhah

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

What is specific about Alqunfudhah for water tank waterproofing

Team note on Alqunfudhah: 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.. Alqunfudhah is about 0.4 km from the sea coast (OpenStreetMap).

The centre of Alqunfudhah sits about 7 m above sea level (SRTM open elevation data).

Picture a family who owns a duplex in Alqunfudhah, with a rooftop water tank that supplies both floors. Over time they notice damp patches on the ceiling below, a faint smell in the water, and a tank that seems to lose water faster than it should. They want the tank sealed properly before the problem spreads into the building structure, and they want to understand what the work involves before anyone starts.

The local setting matters. The centre of Alqunfudhah sits about 7 m above sea level, and the town is about 0.4 km from the sea coast. That combination means the air is humid and salty for much of the year, which speeds up corrosion of metal fittings and makes surface coatings work harder. For a duplex owner, this means a tank that looks sound from the outside may still be failing at joints and seams, and that any coating chosen should be able to cope with moisture and salt rather than simply covering the surface.

A sensible sequence starts with inspection. Empty the tank, clean out sediment, and look closely at the internal walls, floor, and any cracks, since crack injection is priced per metre and is often needed alongside a full coating. Next, treat all cracks and failed joints before applying anything across the surface. Then choose the internal coating for the tank, costed per m² at SAR 25–60, and allow it to cure fully before refilling. For the rooftop surface beneath the tank, liquid roof waterproofing at SAR 8–25 per m² is a common option, and a bitumen membrane at SAR 15–35 per m² is another. Finally, have the tank refilled slowly, check for leaks over several days, and keep a simple record of the work for future maintenance.

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

Signs that call for water tank waterproofing

If you notice one of these signs in Alqunfudhah, it is a good moment to talk to the team:

• 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.
• 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.

Quick comparison: facts and costs in Alqunfudhah

Questions from Alqunfudhah

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.