Roof tank leak detection for warehouses in Al Mhmdya, Riyadh

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

Why roof tank leak detection 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 service-area circle on the map below is drawn from this point. Main roads in or near Al Mhmdya: King Fahd Road, King Abdullah Road, Al Takhassusi Road.

The centre of Al Mhmdya sits about 625 m above sea level (SRTM open elevation data). The nearest wadi channel is about 1.9 km from the centre of Al Mhmdya (OpenStreetMap).

A warehouse owner in this part of Riyadh often notices the problem only when water appears on the floor or a stain spreads across a ceiling panel. By then, the leak may have been running for some time, and the storage tank on the roof may be losing water quietly through a cracked seam, a failed valve gasket or a corroded base. The owner usually wants to know two things: where the water is escaping, and whether the repair can be planned without emptying the building's supply for longer than necessary.

Al Mhmdya sits at about 24.7326, 46.6503, roughly 3.3 km from the centre of Riyadh, within an approximate radius of 2 km. The area lies about 625 m above sea level, and the nearest wadi channel is about 1.9 km from its centre. For a roof tank, the elevation and distance from a wadi mean that the site is not in a low-lying hollow where runoff collects, but it is close enough to a natural drainage line that heavy rain can carry dust and grit into roof gutters and tank inlets. Grit left on tank lids and overflow pipes can wear seals faster, so owners here should check those points after storms as well as during routine inspections.

A practical sequence starts with a visual check of the tank exterior, the inlet and outlet fittings, the base and the roof supports, followed by a dry-day test to see whether the level drops when no water is being drawn. Next, isolate the valves one by one to find which line or fitting is losing water. Where a coating has failed, the internal surface will need repair, and the cost is usually quoted per square metre, at SAR 25–70 per m² for internal tank coating, so measuring the affected area first gives a more reliable estimate. Finally, record the findings, note the date and the rainfall conditions, and schedule a recheck, so the owner can confirm that the repair has held.

For warehouses, work is phased around operations and stored goods.

Signs worth paying attention to

The following signs are worth checking before they grow:

• Repeated spills from the overflow outlet
• Water on the roof around the tank base
• A stain on the top-floor ceiling

Causes we see in the field

• A worn float valve — we check this before anything else.
• A fibreglass or polyethylene tank cracking in the sun — we check this before anything else.
• Inlet and outlet connections — we check this before anything else.

Tools we use in Al Mhmdya

How the work is done, step by step

1. Inspecting the base and connections: We look at where water gathers and trace it back.
2. Level test: The level is recorded with filling stopped.
3. Float and overflow check: We confirm whether water is escaping through the overflow rather than the tank body.
4. Recommendation: Repair of the connection, the float or the tank, stated in writing.

Facts and costs — Al Mhmdya

Common questions about roof tank leak detection in Al Mhmdya

Common mistakes we see

• Mistaking a float overflow for a leak in the tank body

What you receive

You receive: the source of the water identified: tank body, connections or float valve, in a technical report with a verification code.