Water tank waterproofing in Al Mrwj, Riyadh: for companies (annual contract)

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

What is specific about Al Mrwj for water tank waterproofing

The centre of Al Mrwj is at 24.7578, 46.6637, about 5 km from the centre of Riyadh, with an approximate radius of 2.1 km. The service-area circle on the map below is drawn from this point. Al Mrwj has both villas and apartment buildings.

The centre of Al Mrwj sits about 635 m above sea level (SRTM open elevation data). Main roads in or near Al Mrwj: King Fahd Road, Northern Ring Road, King Abdulaziz Road.

The nearest wadi channel is about 2.8 km from the centre of Al Mrwj (OpenStreetMap).

Does a water tank in Al Mrwj, Riyadh need waterproofing, and how do you know whether it does? Al Mrwj is a neighbourhood with both villas and apartment buildings, and the centre sits at 24.7578, 46.6637, about 5 km from the centre of Riyadh, with an approximate radius of 2.1 km. It also sits about 635 m above sea level, and the nearest wadi channel is about 2.8 km from the centre. For companies and property managers running several buildings in this area, these facts matter because tanks on rooftops and at ground level see different exposure, and the signs of seepage are the same whichever type you have. Tank internal coating is priced at SAR 25–65 per m², and tank problems often start there, so an early look is worth the time.

Our inspection starts with a visual check of the tank walls, floor, lid and inlet and outlet fittings, looking for staining, flaking, hairline cracks and damp patches. Where cracks are found, crack injection, priced at SAR 40–125 per metre, is one option to consider. The inspector then notes the surface type and its condition, since epoxy coating (SAR 35–95 per m²) and spray foam (SAR 20–45 per m²) suit different substrates. The report sets out which areas need work and gives a size-based scope for each, so the client can compare options before anything is decided. Nothing is installed during the inspection itself.

Before the visit, please gather the building details: the tank's location, whether it is on the roof, at ground level or in a basement, and its approximate dimensions. Note any past leaks, repairs or coatings you already know about, and when the tank was last cleaned. If the tank serves an apartment building, let the building manager know in advance so access to the roof or plant room can be arranged. Having the access route and any previous invoices ready will help the inspector give you a clearer scope and a more useful estimate.

For companies, an annual contract sets the scope, the visit schedule and the reports in writing.

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

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

How we choose the tool in Al Mrwj

How the work is done, step by step

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 Mrwj

Short answers for Al Mrwj

Common mistakes we see

• Using a material that is not intended for drinking water

What you receive

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.