Basement & foundation waterproofing in Najran: cost & published offers

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

Before we start: what we know about Najran

The centre of Najran sits about 1309 m above sea level (SRTM open elevation data). Main roads in or near Najran: Al Jarba Street.

Team note on Najran: 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..

Before any material is chosen, a technician in Najran checks the basement or foundation against the altitude of the city itself. The centre of Najran sits about 1309 m above sea level (SRTM open elevation data), so the ground here is typically higher and drier than the coastal areas many people compare it with. Seepage in a Najran basement usually comes from surface water that runs down the slope after rain, rather than from a high water table, so the first question is where the water enters and which way it travels. This shapes whether the work should focus on the wall face, the joint at the slab, or the drainage around the outside.

Several things are left to the site visit, because they cannot be judged from a description. These include the condition of existing cracks, whether a crack is active or already stable, the state of any old bitumen or coating, the depth of the foundation, and how water is actually moving through the structure on the day. The technician will also check whether the basement is used for storage, living space, or a water tank, since that changes the choice of finish. Prices in this area are given as ranges: basement waterproofing costs SAR 50–150 per m², crack injection costs SAR 40–120 per metre, and the exact figure depends on what the inspection reveals. Epoxy coating ranges from SAR 35–90 per m², spray foam from SAR 20–45 per m², and a bitumen membrane from SAR 15–35 per m², so the final method and quantity determine where in each range the job falls.

To help the technician prepare, it is useful to have a few details ready. Note where water appears, whether after rain or constantly, and how long the dampness lasts after the rain stops. Share the approximate area of wall and floor affected, the length of any visible cracks, and whether the space holds a tank or is used for bathrooms above it. Photographs taken during or just after rain are especially helpful. Other reference figures in this range include XPS boards at SAR 12–30 per m², tank internal coating at SAR 25–60 per m², and bathroom waterproofing at SAR 15–40 per m², which may matter if the basement connects to wet areas above.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

When do you need basement & foundation waterproofing?

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

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

Causes we see in the field

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

Tools we use in Najran

The steps in order

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.

Najran in facts and sources

Questions from Najran

What we advise against

• Painting the basement wall while the water comes from outside

What you receive

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