Bathroom waterproofing for warehouses in Qatif

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

Bathroom waterproofing in Qatif: the local context

Team note on Qatif: 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.. Qatif is about 2.5 km from the sea coast (OpenStreetMap).

The centre of Qatif sits about 5 m above sea level (SRTM open elevation data).

Qatif sits on the eastern coast of Saudi Arabia, with its town centre about 5 m above sea level, and the sea itself lies roughly 2.5 km away. That combination of low ground and close proximity to the coast means warehouse floors and wet areas are exposed to damp air and groundwater pressure that can rise more easily than in higher inland towns. For a warehouse bathroom or washroom block, the practical effect is that moisture moves up and sideways through concrete rather than only arriving from above, so the waterproofing has to be planned as a full system rather than a single coat applied where water is visible.

Each of these location facts translates into a clear service choice. Because the ground is low and the coast is near, we first check for moisture sources beneath the slab before recommending a finish, and we often pair a bathroom waterproofing system with a bitumen membrane or epoxy coating where wet areas meet the floor. Typical pricing for bathroom waterproofing sits at SAR 15–40 per m², while epoxy coating ranges from SAR 35–90 per m², so the scope is set once the surfaces and exposure are measured. Spray foam, at SAR 20–45 per m², suits irregular surfaces, and XPS boards at SAR 12–30 per m² are used where insulation and moisture control must work together. Crack injection, priced at SAR 40–120 per metre, is the first step wherever cracks let water through.

Owners who avoid problems tend to plan around the same few errors. They do not skip surface preparation, because a coating laid over dust, laitance or damp concrete will lift quickly. They do not treat a roof, basement and bathroom as one job with one product, since liquid roof waterproofing at SAR 8–25 per m² and tank internal coating at SAR 25–60 per m² each need their own specification. They also avoid sealing cracks without first finding out why they formed, and they do not leave joints and drain edges untreated, because water finds those points first. Asking for a written scope that lists each area, product and measurement before work begins is the simplest way to keep the job on track.

For warehouses, work is phased around operations and stored goods.

Signs that call for bathroom waterproofing

The following signs are worth checking before they grow:

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

Causes we see in the field

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

Tools and methods, and when we use them

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.

Quick comparison: facts and costs in Qatif

Common questions about bathroom waterproofing in Qatif

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.