Basement & foundation waterproofing in Riyadh: before buying or handover

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

Before we start: what we know about Riyadh

Main roads in or near Riyadh: King Fahd Road, King Abdullah Road, King Abdullah. The centre of Riyadh sits about 637 m above sea level (SRTM open elevation data).

Team note on Riyadh: 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..

The centre of Riyadh sits about 637 m above sea level, on a broad, high plateau rather than near the coast or a major river valley. For a homeowner this matters because the ground around a basement is shaped by a dry climate and by rainfall that tends to arrive in short, intense bursts. Water does not drain away gradually; it can pool against walls and run toward the lowest point of the plot. Before any work starts, a surveyor should check how the site falls, where runoff will collect, and whether the basement sits below the level that water naturally flows toward.

That terrain has a direct effect on how the service is planned. Because heavy rain can build up quickly against a basement wall, the scope usually covers more than one layer. The main options carry rough price ranges that help owners compare approaches: basement waterproofing costs SAR 55–160 per m², epoxy coating SAR 35–95 per m², spray foam SAR 20–45 per m², and XPS boards SAR 15–30 per m². Crack injection, which seals a visible defect in a wall, is priced at SAR 40–125 per metre. A sound plan usually combines a membrane or coating on the wall with targeted crack repair, rather than relying on one product for every problem. Where a basement holds a water tank, tank internal coating at SAR 25–65 per m² should be included in the same assessment so that the whole structure is treated together.

Owners often make the same avoidable errors. The first is treating the basement as a single surface and skipping the cracks, which will leak through even a good membrane. The second is comparing quotes only by the lowest per-square-metre figure, without checking what is included, such as surface preparation and drainage. A third is leaving the roof and bathrooms out of the plan, when liquid roof waterproofing at SAR 10–25 per m², bitumen membrane at SAR 15–35 per m² and bathroom waterproofing at SAR 15–40 per m² often protect the same building from the same water. Finally, many owners wait until water has already entered the living space, when the cheaper and simpler time to act was during planning, before the walls were finished.

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

Signs worth paying attention to

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

• 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.

How we choose the tool in Riyadh

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 Riyadh

Short answers for Riyadh

Common mistakes we see

• Painting the basement wall while the water comes from outside

The written outputs

The written output: the source, the treatment and the follow-up result. The report is numbered and can be checked with its verification code.