Basement & foundation waterproofing in Jubail: before buying or handover

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

Basement & foundation waterproofing in Jubail: the local context

The centre of Jubail sits about 4 m above sea level (SRTM open elevation data). Jubail is about 0.9 km from the sea coast (OpenStreetMap).

Team note on Jubail: 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..

Basement and foundation waterproofing in Jubail starts with the site's position. The centre of Jubail sits about 4 m above sea level (SRTM open elevation data), and the town is about 0.9 km from the sea coast (OpenStreetMap). Because the ground is low and close to the water, the first check is whether the basement walls and floor are exposed to groundwater or salt-laden moisture, not just surface rain. A technician will look at the wall face, the junction between wall and floor, and any signs of efflorescence or damp patches, since these show where water is already getting in.

Several items are left to the site visit, because they cannot be judged from a distance. These include the depth of the basement below the surrounding ground, the condition and age of the existing concrete, whether there are active cracks, the route of drainage around the building, and how the water table behaves after heavy use of the area. The technician will also decide whether the basement is used for storage, living space or plant, since that changes how much moisture the finish must resist. Any price range should be read as a starting point only, as the final scope depends on what the inspection finds. For reference, basement waterproofing is typically quoted at SAR 50–150 per m², crack injection at SAR 40–120 per metre, and XPS boards at SAR 12–30 per m², but the right choice depends on the findings.

To help the technician prepare, residents and expats should share the building plans if available, the age of the structure, any past repairs or leaks, and photos of the affected walls taken after rain. It also helps to note when the damp appears, whether after rain, after irrigation, or all year. Mention if the basement has a sump or pump, and whether the adjacent ground has been raised or paved recently. Clear answers to these points let the technician plan the work, select the right system for the wall and floor, and give a realistic scope before any materials are ordered.

Before buying or taking over a property, an inspection gives you findings in writing before you sign.

When do you need basement & foundation waterproofing?

If you notice one of these signs in Jubail, it is a good moment to talk to the team:

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

Causes we see in the field

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

Tools and methods, and when we use them

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.

Facts and costs — Jubail

Questions from Jubail

Common mistakes we see

• 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.