Bathroom waterproofing in Yanbu: without breaking

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

Before we start: what we know about Yanbu

Main roads in or near Yanbu: King Abdulaziz Road, Umluj Road, Al Hanan Street. Team note on Yanbu: 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..

Yanbu is about 1.2 km from the sea coast (OpenStreetMap). The centre of Yanbu sits about 6 m above sea level (SRTM open elevation data).

Bathroom waterproofing in Yanbu starts with the location itself. The centre of Yanbu sits about 6 m above sea level, and the city is about 1.2 km from the sea coast, so the first check is usually how water already moves through the bathroom floor, walls and drain points, and whether the existing layer has lifted or cracked. Because the coast is close, salt-laden air and damp ground are part of the picture, so the technician looks at signs of older moisture before deciding on a product. A typical bathroom job is priced at SAR 15–40 per m², which covers the basic surface work, but the final scope depends on what is found once the old finish is opened up.

Several things are left to the site visit, because they cannot be judged from a description. The technician measures the actual floor and wall area, notes any cracks and how long they run, and decides whether crack injection at SAR 40–120 per metre is needed before the main layer goes on. The choice between a liquid system, a bitumen membrane at SAR 15–35 per m², spray foam at SAR 20–45 per m², or an epoxy coating at SAR 35–90 per m² depends on the substrate, the slope to the drain and how the room is used. Where a wet area sits above another room, the technician also checks the edges, upstands and pipe penetrations, since these are where leaks usually begin.

To help the technician, it is useful to have the following ready before the visit: a rough sketch of the bathroom with the drain and any sloped areas marked, the age of the building if known, any past leaks or stains on the ceiling below, and photos of visible cracks. Say whether the bathroom is shared or used by children, and whether the floor is tiled, screeded or stone. Clear access to the shower area and the outside of the wall, where reachable, lets the technician plan the work without opening more than needed. With this information, the visit can focus on confirming the scope rather than discovering it.

The aim is to locate the cause with instruments first, so any opening is limited to one point.

When do you need bathroom waterproofing?

These are the signs most often linked to bathroom waterproofing:

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

Causes we see in the field

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

Tools we use in Yanbu

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.

Quick comparison: facts and costs in Yanbu

Questions from Yanbu

What we advise against

• Waterproofing the floor while the supply pipe still leaks

What you get after the work

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