Basement & foundation waterproofing for schools in Almahd

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

Before we start: what we know about Almahd

Team note on Almahd: 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 Almahd sits about 1047 m above sea level (SRTM open elevation data).

For schools in Almahd, the most common problem with basements and foundations is water seeping through walls and floor slabs after rain, leaving damp patches, staining and cracks that widen over time. Classrooms, storerooms and plant rooms below ground are especially exposed, because the centre of Almahd sits about 1047 m above sea level, where seasonal rain can arrive in sudden heavy bursts that saturate the ground around a building faster than it can drain away.

Because of this, the approach for a school basement in Almahd starts with the surrounding ground and the wall itself rather than the surface finish. Crack injection is often priced per metre, at SAR 40–120 per m, and is used where a specific leak line can be traced. Where the wall is damp across a broad area, basement waterproofing is quoted per square metre at SAR 50–150 per m², and a bitumen membrane at SAR 15–35 per m² or XPS boards at SAR 12–30 per m² may be considered as part of the system. Epoxy coating at SAR 35–90 per m² and spray foam at SAR 20–45 per m² are options for particular surfaces, and any water tanks on site can be treated with a tank internal coating at SAR 25–60 per m². The right mix depends on what is actually found on inspection, not on a single product.

Before the visit, it helps to ask the service provider a few clear questions. Ask where the water is entering, whether the damp appears after rain or constantly, and whether the basement walls have been opened up before. Ask how the quote will be measured, whether per square metre or per metre of crack, and what is included in each line. Ask whether the school has any tanks or bathrooms below ground that should be checked at the same time. Finally, ask the provider to explain how the work will be scheduled around teaching hours so that pupils and staff are not disrupted.

For schools, the larger jobs are planned for weekends and holidays.

Signs that call for basement & foundation waterproofing

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

Causes we see in the field

• 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 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.

Quick comparison: facts and costs in Almahd

Common questions about basement & foundation waterproofing in Almahd

Common mistakes we see

• 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.