Basement & foundation waterproofing in Aljumum: before buying or handover

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

Basement & foundation waterproofing in Aljumum: the local context

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).

Aljumum sits in the western hills of Makkah Province, with the centre of the area about 200 m above sea level (SRTM open elevation data). That height means the ground here drains differently from the flat coastal plains, and water that falls on higher slopes often finds its way toward lower-lying plots and basements. For a homeowner, this slope-driven runoff is the first thing a waterproofing contractor should assess, because it shapes where pressure builds against a basement wall after heavy rain.

Because of this terrain, the service starts with a site check rather than a standard quote. A basement waterproofing job in Aljumum is priced at SAR 50–150 per m², and the final figure depends on how exposed the wall is to runoff, the condition of the existing surface, and whether cracks need attention. Crack injection, priced at SAR 40–120 per metre, is often needed alongside the main system, so the length of visible cracks should be measured before work begins. Bathroom and tank work follow the same logic: bathroom waterproofing at SAR 15–40 per m² and tank internal coating at SAR 25–60 per m² are scoped on the actual surfaces that will hold water, not on a generic floor plan. Roof work, from liquid roof waterproofing at SAR 8–25 per m² to a bitumen membrane at SAR 15–35 per m², is chosen to suit how the roof is used and how water runs off it.

Owners in Aljumum commonly avoid several costly errors by planning ahead. They do not treat the slope as irrelevant and skip the drainage check, which leaves water to pool against the foundation. They do not compare quotes by price alone, since epoxy coating at SAR 35–90 per m² and spray foam at SAR 20–45 per m² suit different conditions. They avoid sealing a crack without first confirming its cause. They also ask for each surface to be measured in square metres or metres, so the scope and the cost can be checked line by line before any material goes on the wall.

Before buying or taking over a property, an inspection gives you findings in writing before you sign.

Signs worth paying attention to

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

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

Where the problem usually comes from

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

Tools we use in Aljumum

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

Questions from Aljumum

Mistakes that cost more

• Painting the basement wall while the water comes from outside

What you get after the work

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