Basement & foundation waterproofing for apartments in Aljumum

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

Basement & foundation waterproofing in Aljumum: the local context

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..

An apartment owner in Aljumum who notices damp patches on a basement wall, a faint smell after rain, or peeling paint near the floor is usually dealing with water that has found its way in slowly over time. Many owners in this situation hope the problem will stay small, but moisture below ground level tends to spread into stored belongings, electrical fittings and the structure itself if it is left alone.

Aljumum sits about 200 m above sea level, which is a useful fact for owners to keep in mind. Sites at this height do not sit in a low basin where water collects, but that does not remove the need for waterproofing. Water still finds its way through cracks, joints and porous concrete, and the practical question is which part of the wall, floor or roof is letting it in. Knowing the cost ranges also helps owners plan. Basement waterproofing is priced at SAR 50–150 per m², bathroom work at SAR 15–40 per m², and crack injection at SAR 40–120 per metre, so a clear survey of where the damage is will show which combination of work makes sense.

A sensible approach starts with inspection. Walk the basement after a period of rain and mark every damp patch, crack and stain. Next, decide which areas need attention: basement walls and floors, bathrooms above, or the roof. For cracks, crack injection is usually the first step. For larger basement areas, compare options such as epoxy coating at SAR 35–90 per m², spray foam at SAR 20–45 per m², or a bitumen membrane at SAR 15–35 per m². Roof surfaces can be treated with liquid roof waterproofing at SAR 8–25 per m². Finally, ask for written quantities and rates before work begins, so the scope matches the areas you marked during the inspection.

In an apartment, a problem may start in your unit or in a shared line; we separate the two before any work.

Signs worth paying attention to

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

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.

How we choose the tool in Aljumum

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.

Quick comparison: facts and costs in Aljumum

Questions from Aljumum

Common mistakes we see

• Painting the basement wall while the water comes from outside

What you receive

You receive: the source, the treatment and the follow-up result, in a technical report with a verification code.