Water tank waterproofing for apartments in Tabarjal

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

Water tank waterproofing in Tabarjal: the local context

The centre of Tabarjal sits about 548 m above sea level (SRTM open elevation data). Team note on Tabarjal: 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 an apartment owner in Tabarjal who notices a damp patch spreading across the ceiling below the rooftop water tank. The building is a few years old, the tank has been sitting in the sun, and the owner wants to know whether the problem is the tank itself or the roof above it. Before calling anyone, this owner needs a clear sense of what the work involves and what it is likely to cost.

The local setting matters. The centre of Tabarjal sits about 548 m above sea level, a height that brings strong daytime heat and sharp temperature swings, both of which stress concrete, sealants and coatings over time. Water tanks in such conditions tend to expand and contract, which opens hairline cracks at joints and corners. For the owner, this means a leak is rarely a single event; it is usually the result of years of thermal movement. Choosing a repair that accommodates movement, rather than simply painting over the surface, is the difference between a fix that lasts and one that returns within a season.

Start by inspecting the tank and the roof slab beneath it from both sides, marking every crack and damp line. Clean the surfaces thoroughly and remove any loose material. Where cracks are active, inject them first, since crack injection is priced per metre and is usually the logical first repair. Next, treat the tank's internal surface with a tank internal coating, priced per square metre, and make sure the coating reaches up the walls and into the corners. Then address the roof itself: liquid roof waterproofing suits open areas, while a bitumen membrane or XPS-based insulation can be considered where heat load is a concern. Finish by testing the tank with a full fill and watching for seepage for several days before closing the inspection hatch.

Ask every contractor to itemise work per square metre or per metre, so that quotes can be compared fairly, and insist that the scope covers the specific cracks and surfaces you have marked.

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

Signs that call for water tank waterproofing

The following signs are worth checking before they grow:

• 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

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

Tools and methods, and when we use them

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.

Facts and costs — Tabarjal

Common questions about water tank waterproofing in Tabarjal

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.