Basement & foundation waterproofing for apartments in Yanbu

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

Why basement & foundation waterproofing differs in Yanbu

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).

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's city centre sits about 6 m above sea level, and the coast is only about 1.2 km away, so the first thing we check on any basement or foundation job is how water reaches the structure and where it is likely to collect. A low-lying site close to the sea can see groundwater that rises and falls with the seasons, so the technician looks at the walls, floor joints and any cracks before deciding on a method. Basement waterproofing is priced from SAR 50 to SAR 150 per m², and that range reflects how much of the wall and floor area is affected and how the surface must be prepared. Crack injection, which is charged per metre at SAR 40 to SAR 120, is often the first step where a visible leak line runs through the concrete.

Some points can only be settled on the site visit. The technician has to confirm how wet the basement really is, whether the water comes through cracks, joints or the surrounding soil, and how much of the wall needs covering. The choice between epoxy coating at SAR 35 to SAR 90 per m², spray foam at SAR 20 to SAR 45 per m², or bitumen membrane at SAR 15 to SAR 35 per m² depends on the surface condition and access. Whether a drainage detail or XPS boards at SAR 12 to SAR 30 per m² suit the wall also depends on what is found in person. Nothing is fixed until the visit is complete.

To help the technician arrive prepared, the resident or building manager should note where water has been seen, how often it appears after rain or high tides, and any past repairs to the basement walls or floor. Photographs of cracks and stains are useful, as are the approximate dimensions of the basement and any adjoining bathroom or tank areas, since bathroom waterproofing costs SAR 15 to SAR 40 per m² and tank internal coating costs SAR 25 to SAR 60 per m². Access to the basement at the time of the visit, and clear information about who owns the building structure, will also speed up the assessment.

In apartment buildings, the floor below is often where a leak shows first.

Signs worth paying attention to

These are the signs most often linked to basement & foundation waterproofing:

• Salt marks at the bottom of the walls
• Damp basement walls
• Water seeping in after rain

Causes we see in the field

• A high groundwater level.
• Rainwater draining towards the foundation.
• Cracks at construction joints — we check this before anything else.

How we choose the tool in Yanbu

How the work is done, step by step

1. Finding the source: Groundwater, rain or a pipe — each needs a different treatment.
2. Preparation: Surfaces are cleaned and opened where needed.
3. Injection: Active cracks are injected.
4. Waterproofing layers: The system is applied on the right side of the wall where possible.
5. Follow-up: Readings are repeated after the treatment.

Quick comparison: facts and costs in Yanbu

Short answers for Yanbu

What we advise against

• Painting the basement wall while the water comes from outside

What you receive

You receive: the source, the treatment and the follow-up result, in a technical report with a verification code.