Bathroom waterproofing for residential buildings in Aldiriyah

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

Before we start: what we know about Aldiriyah

The centre of Aldiriyah sits about 655 m above sea level (SRTM open elevation data). Team note on Aldiriyah: 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..

Before any quote is discussed in Aldiriyah, the first thing a technician checks is the bathroom floor and the joints where it meets the walls, because that is where water most often gets through in residential buildings. The centre of Aldiriyah sits about 655 m above sea level, and that matters for planning the work: the site is elevated, so the team confirms how the existing drainage falls and whether water will run toward the floor trap or pool at the threshold. Bathroom waterproofing typically falls in the range of SAR 15–40 per m², and that figure is a starting point for the scope, not a final price. Epoxy coating, which runs SAR 35–90 per m², and spray foam, at SAR 20–45 per m², are both options a technician may discuss once the surface has been inspected.

Some things can only be decided on the site visit. The technician will press on the tiles, look for hollow sounds, and check for staining on the ceiling below, since moisture from an upper bathroom often shows there first. Whether a crack needs injection, which is quoted at SAR 40–120 per metre, depends on its length, width and whether it is still moving. The same applies to the choice between a liquid system and a membrane, because the substrate, the slope and the amount of traffic in the room all change the answer. For a roof or a water tank, the team will decide between liquid roof waterproofing at SAR 8–25 per m², bitumen membrane at SAR 15–35 per m², or tank internal coating at SAR 25–60 per m², and XPS boards at SAR 12–30 per m² may come up where insulation is also needed. None of these can be settled from a desk.

To help the technician arrive prepared, the resident should note when the leak first appeared, whether it is worse after showering or after rain, and which neighbouring flat or floor shows the damage. Photographs of stains, the age of the tiling, and any previous repairs are useful. Access to the flat above, where relevant, saves a second visit. Clear information about the shape of the room, the position of the drain and any water-heater or washing-machine connections lets the technician measure the area accurately, so the quote reflects the real surface to be treated.

For a whole building, a survey of the shared systems comes before unit-by-unit work.

Signs worth paying attention to

The following signs are worth checking before they grow:

• 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 damaged floor layer.
• The area around the floor drain.

Tools and methods, and when we use them

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.

Facts and costs — Aldiriyah

Common questions about bathroom waterproofing in Aldiriyah

Common mistakes we see

• 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.