Water tank waterproofing for schools in Alzulfi

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

Water tank waterproofing in Alzulfi: the local context

Team note on Alzulfi: 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 Alzulfi sits about 615 m above sea level (SRTM open elevation data).

Main roads in or near Alzulfi: King Fahd Road, Sheikh Ibn Baz Square, King Salman Road.

Will a school water tank in Alzulfi need waterproofing, and how do you know? The centre of Alzulfi sits about 615 m above sea level, a setting where tanks and rooftops are exposed to strong sun and temperature swings that can open small cracks over time. Tank internal coating is priced at SAR 25–60 per m², while crack injection is priced at SAR 40–120 per metre. Choosing between them depends on what the inspection finds, so the first step is always a clear look at the condition of the tank and its surroundings.

The inspection begins with the tank itself: the internal walls, floor and joints are checked for cracks, flaking or damp patches, and the roof above it is reviewed for ponding or failed surface layers. Where cracks are narrow and isolated, crack injection may be the right repair, and the length of each crack is measured in metres so the work can be priced line by line. Where the surface is widely worn, a full internal coating is more likely to be recommended. The inspector also notes whether the tank sits on a roof, which affects whether liquid roof waterproofing at SAR 8–25 per m² or a bitumen membrane at SAR 15–35 per m² is the better match for the surrounding area. The findings are recorded so the school can compare options before any work starts.

Before the visit, the school should gather access details, the age of the tank if known, and any notes on past leaks, staining or repairs. Clear access to the tank lid, the roof hatch and the area around the tank saves time on the day. It also helps to tell the inspector which areas of the building are in use, so work can be scheduled outside teaching hours. Keep any previous invoices or reports, since they show what has already been done. With this information in hand, the visit can focus on what matters and give the school a clear, written basis for deciding on repairs.

For schools, the larger jobs are planned for weekends and holidays.

Signs that call for water tank waterproofing

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

• 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.
• A common cause: damaged old coating.
• A common cause: cracks in the walls or floor.

How we choose the tool in Alzulfi

From the first visit to the report

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.

Alzulfi in facts and sources

Short answers for Alzulfi

What we advise against

• Using a material that is not intended for drinking water

The written outputs

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