Bathroom waterproofing for duplexes in Sharurah

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

Bathroom waterproofing in Sharurah: the local context

The centre of Sharurah sits about 724 m above sea level (SRTM open elevation data). Main roads in or near Sharurah: King Abdulaziz Road, King Fahd Road.

Team note on Sharurah: Kashf teams serve this city and its nearby districts with the same documented inspection standard: device-based leak detection without demolition, a written report, and a clear scope before any work begins..

Picture a family who owns one half of a duplex in Sharurah. Their upper-floor bathroom has started to show a damp patch on the ceiling below, and the tiles near the shower look darker than they did last year. They are not sure whether the problem is the tiles, the grout, or water working its way through the floor, and they want a fix that lasts without disrupting the neighbours on the other side of the wall.

Sharurah sits about 724 m above sea level, so the town is a high-elevation place with its own weather patterns, and the local facts matter for a bathroom in a duplex. Bathroom waterproofing is priced at SAR 15–40 per m², which covers the floor and the lower wall zone where water collects. Spray foam costs SAR 20–45 per m² and epoxy coating SAR 35–90 per m², so the choice between them usually depends on how much wear the surface will take and how much access you have. Where a crack runs through the wall or floor, crack injection at SAR 40–120 per metre is often the first job, because sealing the line stops water at its source. If the damp comes from the roof above the bathroom, liquid roof waterproofing at SAR 8–25 per m² or a bitumen membrane at SAR 15–35 per m² may be the more sensible spend.

A practical order helps keep costs and disruption under control. First, trace the source: check the ceiling below, the shower tray edge, and any hairline cracks, and mark them. Second, repair cracks by injection before anything else, so the surface treatment sits on sound material. Third, decide the coating for the wet floor, comparing bathroom waterproofing with spray foam or epoxy depending on the finish you want. Fourth, if the roof is involved, treat it separately using liquid coating or membrane. Finally, let each layer cure fully before tiling or painting, and agree the sequence with your neighbour, since shared walls and roofs in a duplex mean one owner's repair can affect the other.

In a duplex, the two floors often share lines, so tests are done floor by floor.

Signs worth paying attention to

If you notice one of these signs in Sharurah, it is a good moment to talk to the team:

• A stain under the bathroom on the floor below
• Damp around the shower
• Worn grout

Causes we see in the field

• Corners without waterproofing tape — we check this before anything else.
• A common cause: a damaged floor layer.
• A common cause: the area around the floor drain.

How we choose the tool in Sharurah

How the work is done, step by step

1. Finding the source: A supply-pipe leak is ruled out first.
2. Preparation: The floor is opened and cleaned where needed.
3. Corners and details: Tape and detailing at corners, drains and pipe entries.
4. Flood test: The floor is tested before tiling.

Sharurah in facts and sources

Questions from Sharurah

Common mistakes we see

• Waterproofing the floor while the supply pipe still leaks

What you receive

You receive: the flood-test result and photos of each stage, in a technical report with a verification code.