Water tank waterproofing for apartments in Jazan

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

Water tank waterproofing in Jazan: the local context

Team note on Jazan: 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 Jazan sits about 7 m above sea level (SRTM open elevation data).

Jazan is about 1.9 km from the sea coast (OpenStreetMap).

An apartment owner in Jazan often lives with a rooftop or ground-level water tank that is easy to forget until a leak shows up as a damp patch on a ceiling below. Many owners only think about the tank when the water smell changes or the flow drops, and by then the problem has usually spread. Tenants and expats renting in the building may notice the damage first, which is why it helps to check the tank before any stain appears.

The local facts give the reasoning behind that caution. The centre of Jazan sits about 7 m above sea level, and the city is about 1.9 km from the sea coast. Both points mean a tank here sits in a warm, humid coastal setting where moisture is never far away, so seams and cracks can keep working even when the surface looks dry. A tank internal coating is priced at SAR 25–60 per m², and that is usually the first repair worth budgeting for, because water that gets behind a damaged lining can reach the structure around it. Owners should compare that figure with the cost of repairing ceilings and walls below, which can be far higher.

A practical sequence keeps the work manageable. Start by emptying the tank and inspecting the inside for cracks, flaking paint, and loose joints, then mark every defect you find. Next, treat the cracks: crack injection is priced at SAR 40–120 per metre, so measure the total length before requesting quotes. Then decide on the lining, comparing the tank internal coating range of SAR 25–60 per m² with an epoxy coating at SAR 35–90 per m² for surfaces that take heavier wear. Finally, check the roof around the tank, where liquid roof waterproofing at SAR 8–25 per m² or a bitumen membrane at SAR 15–35 per m² can stop leaks running down into the tank space.

In an apartment, a problem may start in your unit or in a shared line; we separate the two before any work.

When do you need water tank waterproofing?

If you notice one of these signs in Jazan, 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

The most common causes

• Construction joints.
• Damaged old coating — we check this before anything else.
• Cracks in the walls or floor.

Tools and methods, and when we use them

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.

Facts and costs — Jazan

Questions from Jazan

Mistakes that cost more

• Using a material that is not intended for drinking water

What you receive

You receive: the material name, its batch number and the fill-test result, in a technical report with a verification code.