Water tank waterproofing in Afif: before buying or handover

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

Before we start: what we know about Afif

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.. Main roads in or near Afif: King Abdulaziz Road, King Faisal Road, Airport Road.

The centre of Afif sits about 1040 m above sea level (SRTM open elevation data).

The centre of Afif sits about 1040 m above sea level, according to SRTM open elevation data. At that height the town sees wide daily temperature swings and dry air for much of the year, which means rooftop tanks and their coatings are exposed to strong sun by day and cooler nights. For a water tank, that matters because repeated expansion and contraction stresses seams and joints, so the condition of the existing surface should be checked before any new layer is applied.

Because of that exposure, the practical effect on this service is a focus on the tank's internal coating and external weather-facing surfaces. Tank internal coating is priced at SAR 25–60 per m², and that figure should be read against the actual inside area that needs treatment rather than the outside shell. Liquid roof waterproofing at SAR 8–25 per m² and spray foam at SAR 20–45 per m² are commonly considered for the top of the tank and the surrounding roof, while crack injection at SAR 40–120 per metre is the usual route for a visible hairline split before the wider surface is treated. Before you buy or accept a handover, ask for the measured area and the scope for each of these items in writing.

Owners who avoid trouble in Afif usually steer clear of a few common errors. They do not accept a quote that leaves the tank interior out of the scope, since interior and exterior work are separate line items. They do not agree to coat over a damp or dusty surface, because the new layer will fail to bond. They do not sign off a handover without checking that cracks were injected rather than just painted over, and they do not accept an unmeasured lump sum when the work is priced per square metre or per metre. Confirming these points at the start keeps the job predictable and the tank watertight through the seasons.

Before buying or taking over a property, an inspection gives you findings in writing before you sign.

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:

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

Causes we see in the field

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

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.

Afif in facts and sources

Questions from Afif

What we advise against

• Using a material that is not intended for drinking water

What you get after the work

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.