Basement & foundation waterproofing for warehouses in Aljumum

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

Before we start: what we know about Aljumum

The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data). 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..

Water entering a warehouse basement or floor slab is the most common problem for this kind of property, and it usually shows up as damp patches along the lower walls, efflorescence on concrete, and stored goods getting wet. In Aljumum the centre of the area sits about 200 m above sea level, so the ground here is not the low, flood-prone terrain found in some coastal districts. That changes how we read the problem. Water that reaches a warehouse basement in this area is more often moving through cracks, cold joints and poorly sealed construction seams rather than rising from a high water table, so the first step is always to trace the route the water is taking.

Because of that, the approach here focuses on locating and sealing the entry points before anything else. Crack injection is priced at SAR 40–120 per metre, and it is often the right starting point where the leaks follow a defined line. Where the wet area is wider, basement waterproofing is priced at SAR 50–150 per m², and epoxy coating at SAR 35–90 per m² can be used on internal surfaces where a durable, easy-to-clean finish suits a storage space. For the roof above, liquid roof waterproofing runs at SAR 8–25 per m², and bitumen membrane at SAR 15–35 per m² is an option where a sheet system is preferred. Spray foam at SAR 20–45 per m² and XPS boards at SAR 12–30 per m² are also considered depending on access and the condition of the surface.

Before the visit, it helps to have a few details ready. Tell us the approximate floor area of the basement or affected zone, the roof area, and whether the water appears after rain, after washing down, or all year. Note whether the building has an existing waterproofing layer and when it was last repaired. If the warehouse stores water-sensitive goods, or if any tanks are on site, mention them, because tank internal coating at SAR 25–60 per m² is handled differently. Clear answers to these questions let the inspection focus on the real cause, so the scope and cost can be set out before any work begins.

For warehouses, work is phased around operations and stored goods.

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:

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

The most common causes

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

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.

Quick comparison: facts and costs in Aljumum

Short answers for Aljumum

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.