Water tank waterproofing for apartments in Al Mhmdya, Riyadh

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

Why water tank waterproofing differs in Al Mhmdya

The centre of Al Mhmdya is at 24.7326, 46.6503, about 3.3 km from the centre of Riyadh, with an approximate radius of 2 km. The approximate area shown on the map is centred here. The nearest wadi channel is about 1.9 km from the centre of Al Mhmdya (OpenStreetMap).

The centre of Al Mhmdya sits about 625 m above sea level (SRTM open elevation data). Main roads in or near Al Mhmdya: King Fahd Road, King Abdullah Road, Al Takhassusi Road.

Does a water tank in an apartment building in Al Mhmdya really need waterproofing, and what will it cost? Al Mhmdya sits at a centre point of 24.7326, 46.6503, about 3.3 km from the centre of Riyadh, with an approximate radius of 2 km. The centre of the neighbourhood is about 625 m above sea level, and the nearest wadi channel lies roughly 1.9 km away. Tanks here face the same heat, dust and seasonal runoff as the rest of the city, so leaks in the tank body and its joints are worth checking rather than waiting for damage to show. Tank internal coating is priced at SAR 25–65 per m², which gives owners a clear range to plan around before any work starts.

Our inspection begins with a visual check of the tank walls, floor, lid and inlet and outlet pipes, looking for cracks, flaking coating and staining on the outside of the tank. Where cracks are found, the team measures their length, since crack injection is priced per metre at SAR 40–125 per m. The surfaces to be treated are then measured in square metres, so the quote reflects the real area. Each area is noted by type, whether internal tank coating, roof liquid waterproofing at SAR 10–25 per m², or a bitumen membrane at SAR 15–35 per m². The inspector explains which repair method suits each part of the tank and why, so the owner understands the scope before agreeing to it.

Before the visit, it helps to clear access to the roof and the tank area and to tell the building manager or a resident of any noise or water shut-off you will need. Keep any earlier repair records or invoices, and note the date you first saw damage, such as water marks on ceilings or a drop in tank level. If the tank was drained recently, say so, since this affects the timing of the work. Having these details ready lets the inspection move faster and gives the quote a more accurate base.

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

The most common causes

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

Tools and methods, and when we use them

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.

Quick comparison: facts and costs in Al Mhmdya

Short answers for Al Mhmdya

Mistakes that cost more

• 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.