Water tank waterproofing in Al Aryja, Riyadh: without breaking

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

Why water tank waterproofing differs in Al Aryja

The centre of Al Aryja is at 24.6257, 46.6566, about 10 km from the centre of Riyadh, with an approximate radius of 2 km. The service-area circle on the map below is drawn from this point. Main roads in or near Al Aryja: Yazid bin Abi Sufyan Road, Imam Abu Hanifa Road, Prince Fahd bin Faisal bin Farhan Al Saud Road.

The centre of Al Aryja sits about 629 m above sea level (SRTM open elevation data). The nearest wadi channel is about 0.3 km from the centre of Al Aryja (OpenStreetMap).

Can a water tank be waterproofed in Al Aryja without draining the whole building or breaking into the structure? Al Aryja sits at about 24.6257, 46.6566, roughly 10 km from the centre of Riyadh, with an approximate radius of 2 km, and its centre lies about 629 m above sea level. The nearest wadi channel is about 0.3 km from the centre, which is worth noting because seasonal runoff can stress the outer walls and roof of a tank. For a tank, the work is usually done from the inside, using a tank internal coating priced at SAR 25–65 per m², so the outer structure and the building above can stay in place.

A proper visit starts with an inspection of the tank's interior surfaces to find cracks, flaking, and areas where the existing lining has lifted. Where cracks are found, crack injection is charged per metre at SAR 40–125 per m, and the injection is carried out without opening the tank walls. The inspector then measures the affected surface area so the cost can be stated per square metre, and checks whether the roof above the tank has signs of ponding that could be feeding moisture into the structure. If the roof is part of the problem, liquid roof waterproofing at SAR 10–25 per m² or a bitumen membrane at SAR 15–35 per m² may be recommended, and spray foam at SAR 20–45 per m² is sometimes used on surfaces that need a lightweight seal.

Before the visit, the owner should empty the tank as far as practical and make sure the access hatch or manhole is clear so the technician can get inside. It helps to have the tank's approximate size and any previous repair records ready, and to note where leaks have been seen, whether as damp patches, staining, or a drop in water level. Clear access to the roof and to the tank room, with power available for the work, will save time on the day. Once the inspection is complete, you will have a written breakdown of the work, priced per square metre or per metre, so you can decide on the repair before any work begins.

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

Signs worth paying attention to

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

Where the problem usually comes from

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

Tools we use in Al Aryja

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.

Quick comparison: facts and costs in Al Aryja

Questions from Al Aryja

What we advise against

• 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.