Water tank waterproofing in Aldawadmi: without breaking

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

What is specific about Aldawadmi for water tank waterproofing

The centre of Aldawadmi sits about 976 m above sea level (SRTM open elevation data). Main roads in or near Aldawadmi: King Abdulaziz Road, Dawadmi Bujadiyah Road.

Team note on Aldawadmi: 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..

Aldawadmi sits at the centre of a broad valley in the Riyadh region of Saudi Arabia, with the centre of the town about 976 m above sea level (SRTM open elevation data). That height means cool winter nights and hot, dry summers, with large daily temperature swings that expand and contract concrete and sealants. Water tanks here are often mounted on rooftops or set in the ground, and both see that cycle every day. Owners should expect hairline cracks to appear over time, so a waterproofing plan should allow for movement rather than assume a rigid surface will stay sealed.

Each of these local conditions links directly to how a job is done. Because temperature swings cause cracks, crack injection is priced per metre at SAR 40–120 per m, and it is often the first step before any surface coating. The town's dry air and strong sun make a liquid roof waterproofing system at SAR 8–25 per m² a common choice for flat roofs, since it can be applied in a seamless layer that flexes with the roof. For the tank itself, tank internal coating is priced at SAR 25–60 per m², and the internal surface must be fully cleaned and dried before any product goes on, which is why the work is planned around a fully emptied tank. Where insulation is needed to cut heat gain through a roof-mounted tank, XPS boards at SAR 12–30 per m² can be fitted, although they are a thermal measure and do not replace a waterproof membrane.

Several mistakes are regularly avoided by careful owners. Many people skip crack repair and coat over an active crack, which lets water reach the structure again within a season. Others choose a cheap cover without checking the surface underneath, so the new layer peels. Some owners wait until a leak is visible inside the building, when water has already spread through the concrete. A fourth common error is comparing quotes only by price: a basement job at SAR 50–150 per m² and a bathroom job at SAR 15–40 per m² serve different risks, and the scope should match the exposure. Planning the work around the tank's cycle, cleaning the surface first, and repairing cracks before coating all keep the disruption short and the result lasting.

The aim is to locate the cause with instruments first, so any opening is limited to one point.

Signs that call for water tank waterproofing

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

• 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 — we check this before anything else.
• Construction joints.

Tools we use in Aldawadmi

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 — Aldawadmi

Short answers for Aldawadmi

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.