Bathroom waterproofing for apartments in Aldarb

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

Before we start: what we know about Aldarb

The centre of Aldarb sits about 79 m above sea level (SRTM open elevation data). Aldarb is about 18.7 km from the sea coast (OpenStreetMap).

Aldarb sits about 79 m above sea level, and its centre is roughly 18.7 km from the coast. For bathroom waterproofing, this means the area is inland and not exposed to the salt-laden spray that affects coastal buildings. Work here focuses on keeping water inside the bathroom rather than on guarding against sea air. Surfaces are prepared with the expectation of regular daily use, steam from showers, and cleaning products, rather than heavy salt corrosion on fixings and metal trims.

Because the ground level is not at the coast, the usual concerns are moisture rising through floor slabs and leaks from shower trays, pipe penetrations and tile joints. Installers pay close attention to corners, floor-to-wall junctions and drain outlets, since these are where water most often finds a route. Bathroom waterproofing typically costs SAR 15–40 per m², and the final figure depends on the membrane chosen. Spray foam sits at SAR 20–45 per m², liquid membranes and bitumen membrane at SAR 15–35 per m², and epoxy coating at SAR 35–90 per m² for a harder, more durable finish in wet rooms that see heavy use.

Owners in Aldarb often avoid several common mistakes. They do not skip the tanking of the shower area and rely only on tiles, since grout alone does not stop water. They do not seal cracks in the wall or floor without first injecting them, which costs SAR 40–120 per metre and prevents water from tracking behind new finishes. They also avoid applying coatings to damp surfaces, because moisture trapped beneath the membrane will cause it to lift. Finally, they make sure the coating runs up the wall at least as high as the splash zone, so that the whole wet area is protected.

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 bathroom waterproofing:

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

The most common causes

• Corners without waterproofing tape.
• A damaged floor layer.
• A common cause: the area around the floor drain.

Tools we use in Aldarb

The steps in order

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.

Facts and costs — Aldarb

Common questions about bathroom waterproofing in Aldarb

Mistakes that cost more

• Waterproofing the floor while the supply pipe still leaks

The written outputs

The written output: the flood-test result and photos of each stage. The report is numbered and can be checked with its verification code.