Water tank waterproofing for apartments in Al Flah, Riyadh

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

What is specific about Al Flah for water tank waterproofing

The centre of Al Flah is at 24.7963, 46.7088, about 9.8 km from the centre of Riyadh, with an approximate radius of 1.9 km. The service-area circle on the map below is drawn from this point. Main roads in or near Al Flah: Northern Ring Road, Airport Road, Northern Ring Road.

The centre of Al Flah sits about 645 m above sea level (SRTM open elevation data).

Picture a family that owns a three-storey apartment block in Al Flah, Riyadh. The roof tank is the one part of the building they rarely think about until a damp patch appears on a bedroom ceiling or the water starts to taste wrong. By then the leak has usually been running for a while, and the repair bill has grown with it. For owners of buildings like this, the tank and its roof deserve a regular look, not just a reaction when something goes wrong.

Al Flah sits at about 24.7963, 46.7088, roughly 9.8 km from the centre of Riyadh, within an approximate radius of 1.9 km. It lies about 645 m above sea level. Those facts shape the work in a practical way. Because the area is a little distance from the city core, owners often find that a local tank coating crew is the easier choice, and that trips for materials and inspections need planning. At this elevation and in this climate, roofs and tanks face strong sun, heat swings and dust, so the protective layers on a tank and roof wear out faster than many owners expect. Budgeting for the work in advance is more sensible than waiting for an emergency.

The practical sequence begins with an inspection. Empty the tank, clean out sediment, and look closely at seams, corners and the roof slab above it for cracks or lifting coating. Next, decide what needs doing. Tank internal coating typically falls between SAR 25 and SAR 65 per m², while crack injection is priced per metre at SAR 40 to SAR 125 per m. For the roof, liquid roof waterproofing runs SAR 10 to SAR 25 per m², and bitumen membrane SAR 15 to SAR 35 per m². Ask each contractor to state the area and linear metres in writing so the quotes can be compared fairly. Finally, schedule the work for a dry, mild period, allow the coating to cure fully before refilling the tank, and keep the invoice and product details on file for the next inspection.

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

Signs worth paying attention to

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

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

Causes we see in the field

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

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 — Al Flah

Short answers for Al Flah

Common mistakes we see

• 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.