Water tank waterproofing in Afif: cost & published offers

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

Water tank waterproofing in Afif: the local context

The centre of Afif sits about 1040 m above sea level (SRTM open elevation data). Main roads in or near Afif: King Abdulaziz Road, King Faisal Road, Airport Road.

Team note on Afif: 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..

Picture a homeowner in Afif who has noticed damp patches on the wall beside a rooftop water tank, or a faint smell from the tank room after a wet season. They want the tank sealed properly without paying for work they do not need, and they want to understand what a fair price looks like before they call anyone. Their home may be a villa with a roof tank, a small compound with a ground-level storage tank, or a house with a basement store that sits below the tank area. Each setup leaks in its own way, so the job and the budget will differ.

For someone in this position, the facts point to a few practical realities. The centre of Afif sits about 1040 m above sea level, so the town is high and far from the coast, and owners should expect the tank and roof to deal with a different climate pattern than lower-lying cities. The published ranges show how widely the cost of waterproofing varies by surface. Tank internal coating is quoted at SAR 25–60 per m², while liquid roof waterproofing is SAR 8–25 per m² and bitumen membrane SAR 15–35 per m². Basement waterproofing runs SAR 50–150 per m², so a basement-linked tank room will usually cost more to treat than a plain roof. Crack injection is priced per metre at SAR 40–120 per m, which matters if the leak is a single hairline line rather than a whole surface.

The practical sequence is straightforward. First, drain the tank and find the source of the water, checking whether it comes from a crack, the joint with a wall, or the roof surface around the tank base. Second, measure the affected areas in square metres and the cracks in metres, so you can compare the quotes you receive against the published ranges above. Third, choose the material that fits the surface: epoxy coating at SAR 35–90 per m² or spray foam at SAR 20–45 per m² for specific areas, and XPS boards at SAR 12–30 per m² where insulation is also needed. Fourth, ask each contractor to state the unit they are pricing and the area they assume, then compare like with like. Finally, have the tank refilled only after the coating has fully cured, and keep the invoice and the product details for future maintenance.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

Signs that call for water tank waterproofing

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

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

Causes we see in the field

• A common cause: damaged old coating.
• Cracks in the walls or floor.
• A common cause: construction joints.

How we choose the tool in Afif

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 — Afif

Questions from Afif

What we advise against

• Using a material that is not intended for drinking water

What you get after the work

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