Basement & foundation waterproofing for residential buildings in Aljumum

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

Before we start: what we know about Aljumum

Team note on Aljumum: 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 Aljumum sits about 200 m above sea level (SRTM open elevation data).

Is basement water really worth fixing before it gets worse? For a property owner in Aljumum, the answer depends on the site and the material chosen. The centre of Aljumum sits about 200 m above sea level, according to SRTM open elevation data, and that is the setting in which we assess foundation and basement moisture. Costs vary by method: basement waterproofing ranges from SAR 50–150 per m², bitumen membrane from SAR 15–35 per m², and XPS boards from SAR 12–30 per m². Crack injection, where a leak traces to a single fault line, is priced at SAR 40–120 per metre. The right choice follows from what the inspection finds, not from a single price list.

Our inspection starts with a walk through the basement and the outside of the foundation to locate damp patches, staining, efflorescence and active cracks. We record the length and position of each crack, the wet areas and any signs of water entering from above, such as failed roof coverings or blocked drainage. Where the water is coming from matters as much as where it appears, so we check how the surface drains and whether water is collecting against the walls. We then compare the options that suit the findings, such as epoxy coating at SAR 35–90 per m², spray foam at SAR 20–45 per m², or tank-style internal coating at SAR 25–60 per m² where a below-ground tank is involved. Each recommendation is explained before any work is agreed.

To make the visit productive, have the building details ready: plans or sketches of the basement and its walls, and the dimensions of any wet areas so that areas can be measured accurately. Note when the moisture appears, whether after rain, during dry weather, or after heavy water use, because this shapes the diagnosis. Clear access to the basement, the outside perimeter and any roof areas will let the inspector work without delay. If a previous repair was carried out, bring its records and describe what was done. Finally, decide which parts of the property matter most to you so the scope of the visit can be set around your priorities.

For a whole building, a survey of the shared systems comes before unit-by-unit work.

Signs that call for basement & foundation waterproofing

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

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

Causes we see in the field

• Cracks at construction joints.
• A common cause: a high groundwater level.
• A common cause: rainwater draining towards the foundation.

How we choose the tool in Aljumum

From the first visit to the report

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.

Aljumum in facts and sources

Questions from Aljumum

What we advise against

• 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.