Bathroom waterproofing for restaurants in Dammam

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

Before we start: what we know about Dammam

Dammam is about 4.3 km from the sea coast (OpenStreetMap). The centre of Dammam sits about 12 m above sea level (SRTM open elevation data).

Team note on Dammam: 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..

Bathroom waterproofing for restaurants in Dammam begins with the place itself. The centre of Dammam sits about 12 m above sea level (SRTM open elevation data), and the city is about 4.3 km from the sea coast (OpenStreetMap). Because a restaurant back-of-house bathroom is often wet, busy and close to drainage lines, the technician first checks how water moves across the floor and up the walls, and whether the slab falls correctly toward the drain. Coastal proximity matters for salt exposure at the surface, so the first inspection looks at the existing finish, any efflorescence on the walls, and the condition of the skirting where floor meets wall.

Several things are left to the site visit, because they cannot be judged from a description. The technician needs to see the actual substrate, whether it is sound concrete, block or an older screed, and whether there are cracks that need crack injection, which is priced per metre at SAR 40–120 per m. The choice between a liquid membrane, an epoxy coating, a bitumen membrane or spray foam depends on the surface and the traffic it carries, and the rates for these range from SAR 35–90 per m² for epoxy to SAR 15–35 per m² for bitumen membrane. Where the bathroom sits above another room, the technician also checks the ceiling below for staining, and where a water tank or sump is part of the plumbing, tank internal coating at SAR 25–60 per m² may be considered.

Information that helps the technician is simple to gather before the visit. Note the approximate bathroom floor area and wall height, when the leak or dampness was first noticed, and whether the problem appears after heavy cleaning or only during peak service. Photographs of the drain, the skirting and any cracks are useful, as is a note of how often the room is cleaned with hot water or strong detergent, since this affects the coating choice. Bathroom waterproofing typically falls within SAR 15–40 per m², and the final figure will depend on what the site visit reveals. Share these details when you book so the visit can focus on the work that matters.

For restaurants, visits are planned outside service hours and recorded for the premises file.

When do you need bathroom waterproofing?

The following signs are worth checking before they grow:

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

Causes we see in the field

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

Tools and methods, and when we use them

From the first visit to the report

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.

Dammam in facts and sources

Questions from Dammam

Common mistakes we see

• Waterproofing the floor while the supply pipe still leaks

What you get after the work

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