Water tank waterproofing in Bishah: when to call a technician

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

What is specific about Bishah for water tank waterproofing

The centre of Bishah sits about 1169 m above sea level (SRTM open elevation data). Main roads in or near Bishah: King Saud Road, Riyadh Street.

Should you call a technician when your water tank starts to look or taste wrong? In Bishah, the centre of the city sits about 1169 m above sea level (SRTM open elevation data), and that altitude means many homes rely on rooftop or ground-level tanks that see wide daily temperature swings. Those swings can open hairline cracks in concrete over time, and a tank that is slowly leaking may not show obvious signs until the damage is well advanced. If you notice damp patches on the walls near the tank, a drop in water pressure you cannot explain, or a faint change in colour or smell, it is a good time to book a professional look rather than wait.

A technician's inspection usually starts with the visible surfaces: the interior walls, floor, and joints, checked for cracks, flaking coating, and signs of moisture on the outside. Where a crack is found, the repair is often priced per metre, with crack injection typically falling in the range of SAR 40–120 per m. Interior tank coating is priced per square metre at SAR 25–60 per m², so the technician will usually measure the affected area before giving a figure. The inspection also checks the roof and surrounding structure, since liquid roof waterproofing (SAR 8–25 per m²) and bitumen membrane (SAR 15–35 per m²) protect the area above the tank from water that could otherwise find its way inside.

Before the visit, clear the space around the tank so the technician can reach every side, and note when you first saw a problem, how far it has spread, and whether the water level has changed. Let them know if the tank was recently cleaned or drained, because that affects what they can see. Keep records of any previous repairs, and ask for the work to be quoted per square metre or per metre so you can compare the scope clearly. A short, well-prepared visit usually gives you a clearer picture of what needs fixing and what can wait.

Some signs can be watched for a few days; others need a technician straight away — the signs list above helps you decide.

Signs worth paying attention to

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

• 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.

Tools and methods, and when we use them

How the work is done, step by step

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 — Bishah

Common questions about water tank waterproofing in Bishah

Mistakes that cost more

• Using a material that is not intended for drinking water

The written outputs

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.