Bathroom leak detection for restaurants in Al Mrwj, Riyadh

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

Why bathroom leak detection differs in Al Mrwj

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

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

Al Mrwj has both villas and apartment buildings.

Al Mrwj sits at roughly 24.7578 N, 46.6637 E, about 5 km from central Riyadh, and its main roads include King Fahd Road, the Northern Ring Road and King Abdulaziz Road. The neighbourhood is mostly villas and apartment buildings, and the ground rises to about 635 metres above sea level. Because of this mix, restaurant back-of-house bathrooms often share water lines with dwelling-style plumbing and sit close to kitchens, so the first checks focus on junction points, floor drains and wall penetrations where moisture tends to travel unseen.

For a restaurant, a bathroom leak can reach the dining area or the kitchen ceiling within hours, so the inspection starts with the points that cause the most damage: the toilet base seal, the shower or sink supply connections, and the floor trap. The team uses moisture readings and pressure tests before opening any tiles, because hidden leaks in these spots usually show up first as soft plaster or staining on the wall that backs onto food-prep areas. Once the source is confirmed, the report explains which section needs repair and why it is at risk.

Before the visit, please clear access to the bathroom and any ceiling or service hatch above it, and note the times when the restaurant is quietest so water tests do not disrupt service. Have your latest plumbing drawings or previous repair records ready if you have them. Useful questions to ask the team include how they will protect food-contact surfaces during work, whether the repair affects the water tank, and what the tank-lining cost would be if it is needed: roughly 25 to 65 riyals per square metre, applied from inside after the inspection.

For restaurants, visits are planned outside service hours and recorded for the premises file.

Signs worth paying attention to

The following signs are worth checking before they grow:

• Peeling paint near the floor drain
• Damp in the wall next to the bathroom
• A stain on the ceiling of the floor below the bathroom

Causes we see in the field

• Worn grout joints — we check this before anything else.
• A leaking supply pipe or mixer — we check this before anything else.
• A common cause: damaged floor waterproofing around the drain.

How we choose the tool in Al Mrwj

The steps in order

1. Pipe or waterproofing?: We separate a pressurised pipe leak from water passing through the floor layer.
2. Listening and moisture readings: Readings are taken around the shower, basin and toilet lines.
3. Floor test: A controlled water test on the floor shows whether the layer lets water through.
4. Recommendation: You know which repair is needed before any tile is lifted.

Al Mrwj in facts and sources

Short answers for Al Mrwj

What we advise against

• Re-waterproofing the floor while the pipe is still leaking

The written outputs

The written output: whether the problem is a pipe or the waterproofing, with its position. The report is numbered and can be checked with its verification code.