Basement & foundation waterproofing for hotels & serviced apartments in Aljumum

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

Why basement & foundation waterproofing differs in 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).

Before any work is quoted at a hotel or serviced-apartment basement, the technician first checks the ground-level drainage and the lowest point of the site. The centre of Aljumum sits about 200 m above sea level, according to SRTM open elevation data, so the first questions are how rainwater runs off the surrounding ground and whether it can collect against the lower walls and floor slab. Because basements are the deepest part of a building and are in contact with the soil, this check comes before any choice of membrane or coating. Pricing for basement waterproofing is set per square metre and typically falls in the range of SAR 50–150 per m², so the measured area of exposed wall and floor is recorded at this stage as well.

Several items can only be settled at the site visit. The technician needs to see the actual condition of the concrete, any active cracks, and the position of existing pipes and drains. Crack injection is priced per metre at SAR 40–120 per m, so the length and location of each crack must be measured on the spot rather than estimated from plans. The choice between epoxy coating at SAR 35–90 per m², spray foam at SAR 20–45 per m², a bitumen membrane at SAR 15–35 per m², or XPS boards at SAR 12–30 per m² depends on whether the surface is dry, damp or actively leaking, and on how easily the area can be accessed. Roof and tank areas follow the same logic, with liquid roof waterproofing at SAR 8–25 per m² and tank internal coating at SAR 25–60 per m² each confirmed only after inspection.

To help the technician, it is useful to have the building drawings, the age of the structure, and a record of any past leaks or repairs. Information on when water usually appears, such as after heavy rain or during irrigation, shows whether the problem comes from outside pressure or from within the structure. Guests' areas, bathrooms at SAR 15–40 per m², and service corridors should be marked so work can be scheduled without disrupting occupancy. Clear access routes, a planned window for noisy or ventilated work, and a named contact on site all reduce delays and allow the job to proceed in the right order.

For hotels and serviced apartments, rooms are handled in batches to keep units available.

Signs that call for basement & foundation waterproofing

The following signs are worth checking before they grow:

• 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 — we check this before anything else.
• A high groundwater level.
• Rainwater draining towards the foundation.

Tools and methods, and when we use them

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

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.