Water tank waterproofing for residential buildings in Alqunfudhah

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

Before we start: what we know about Alqunfudhah

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).

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 sits roughly 7 m above sea level, and its centre is only about 0.4 km from the coast. That combination matters for water tanks. Sea air carries salt, which can speed up corrosion on metal fittings and attack weak concrete over time, while the coastal setting also means humidity stays high for much of the year. For a tank waterproofing job, this means the surface preparation and choice of coating need to account for salt-laden air and moisture, not just the tank's age or size.

The modest elevation also shapes how a tank is typically installed and maintained. At around 7 m above sea level, the land is low and flat, so rooftop and ground-level tanks are often exposed to the same wind and weather. Any sealing system has to handle wet-dry cycles and temperature swings on the roof, and joints where the tank meets the base or the roof slab need extra attention. Good drainage around the tank base helps keep water from pooling against the structure.

For owners, the practical steps follow from these conditions. A tank's internal coating is usually priced at SAR 25–60 per m², and choosing a system rated for constant water contact is the most important decision. Where the tank sits on a roof, liquid roof waterproofing at SAR 8–25 per m² or a bitumen membrane at SAR 15–35 per m² can protect the slab beneath it. Cracks in the tank walls should be treated early, since crack injection costs SAR 40–120 per metre and is far cheaper than repairing water damage later. Owners who wait until a leak appears, skip surface cleaning before coating, or ignore the coastal salt exposure often pay more in the end.

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

When do you need water tank waterproofing?

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

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

The most common causes

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

How we choose the tool in Alqunfudhah

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.

Alqunfudhah in facts and sources

Questions from Alqunfudhah

Mistakes that cost more

• 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.