Basement & foundation waterproofing for schools in Alqurayyat

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

Basement & foundation waterproofing in Alqurayyat: the local context

Team note on Alqurayyat: 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 Alqurayyat sits about 497 m above sea level (SRTM open elevation data).

The first thing a technician checks in Alqurayyat is the ground the school sits on. The centre of the town is about 497 m above sea level, according to SRTM open elevation data, so the site's drainage and the way rain runs off nearby slopes shape where water is most likely to press against a basement wall. Before any quote is considered, the technician looks at whether a basement or ground-floor store room is below the surrounding grade, how water currently collects around the foundation, and whether any staining or efflorescence shows on the lower walls. Those observations decide whether the job is a basement waterproofing scope, which for schools is priced at SAR 50–150 per m², or a narrower repair.

Other parts of the work are left to the site visit, because they cannot be judged from a desk. The technician needs to see the actual cracks, measure their length, and decide whether crack injection at SAR 40–120 per metre is enough or whether the wall needs a full system. Bathrooms, washrooms and the school's roof differ in condition, and each may call for a different material, from liquid roof waterproofing at SAR 8–25 per m² to bitumen membrane at SAR 15–35 per m². Any water tank that serves the building may need an internal coating at SAR 25–60 per m², and the choice between epoxy coating at SAR 35–90 per m², spray foam at SAR 20–45 per m², or XPS boards at SAR 12–30 per m² depends on what the surface is and how it will be used. None of these decisions should be made from photographs alone.

To help the technician prepare, it is useful to have the school's floor plan with the basement, store rooms and washrooms marked, any previous waterproofing records, and a note of where water has been seen after rain. Access to the outside of the foundation, if it can be arranged, lets the technician check drainage and the ground level directly. Information about when the school is closed for works matters too, since schools need the affected rooms out of use for safe application and curing. With these details ready, the site visit can move quickly to a clear scope for the building.

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

Signs worth paying attention to

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

Where the problem usually comes from

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

Alqurayyat in facts and sources

Short answers for Alqurayyat

Common mistakes we see

• Painting the basement wall while the water comes from outside

The written outputs

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