Basement & foundation waterproofing in Aljumum: before summer & rain season

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..

Basement and foundation waterproofing in Aljumum is most often needed because water finds its way through cracks and porous walls and collects at the base of the structure. In a property type where the lowest floor sits below ground, even a small seepage can spread across the slab and into stored goods, so the most common first step is to locate the entry points before choosing any material. Crack injection, priced at SAR 40–120 per m, is often the starting point for a sealed fault line, while larger wall areas may need a membrane or coating applied across the surface.

The local setting shapes the approach. The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data), so the ground around your property drains according to its own slope rather than toward a low coastal point. That means surface run-off and groundwater can behave differently from one plot to the next, and a contractor should look at how water moves around the building before deciding between options. Basement waterproofing is quoted at SAR 50–150 per m, epoxy coating at SAR 35–90 per m, and a bitumen membrane at SAR 15–35 per m, so the right mix depends on what the inspection reveals rather than on a single default solution. Where a water tank sits in the same area, internal coating at SAR 25–60 per m is a separate line item to consider.

Before the visit, ask the provider to explain which method they would use for your specific walls and floor, and why. Request that they identify the source of any moisture they find, not only the visible damage. Ask for a written breakdown that separates each task, such as crack injection, wall coating and slab treatment, so you can compare the cost per square metre or per metre of crack. Confirm how far the work will extend past the basement walls and whether the surrounding ground will be checked. Finally, ask how long the works will take and when they can be completed before the summer rains.

Checks before summer and before the rain season catch problems while they are still small.

Signs that call for basement & foundation waterproofing

The following signs are worth checking before they grow:

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

The most common causes

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

Tools we use 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.

Quick comparison: facts and costs in Aljumum

Short answers for Aljumum

Mistakes that cost more

• 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.