Basement & foundation waterproofing in Alkharj: before summer & rain season

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

Why basement & foundation waterproofing differs in Alkharj

Team note on Alkharj: 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 Alkharj sits about 439 m above sea level (SRTM open elevation data).

Main roads in or near Alkharj: King Abdullah Road.

The centre of Alkharj sits about 439 m above sea level, according to SRTM open elevation data. For basement and foundation work, this elevation means the ground is shaped by the surrounding terrain, so water can move toward low points during heavy rain and then sit against the lower walls of a building. Before summer, a survey of the foundation line and the surrounding ground helps show where water is likely to collect, so the waterproofing can be planned for the real conditions on each site rather than applied the same way everywhere.

Each option in the price list suits a different part of the work. Basement waterproofing is priced at SAR 50–150 per m², and this is the main protection for below-ground walls and floors. Crack injection, at SAR 40–120 per metre, is used where the wall already shows a line that could let water through, and it is often a sensible first step before a full coating. Epoxy coating at SAR 35–90 per m² and bitumen membrane at SAR 15–35 per m² give a sealed layer on the surface, while spray foam at SAR 20–45 per m² and XPS boards at SAR 12–30 per m² add a layer that can handle moisture against the wall. Liquid roof waterproofing at SAR 8–25 per m² protects exposed roof areas, and tank internal coating at SAR 25–60 per m² covers water storage. Bathroom waterproofing at SAR 15–40 per m² deals with the wet areas above ground. Choosing the right mix depends on where the water enters and where it is most likely to gather.

Owners often make the same errors, and avoiding them saves money and repeat work. A common mistake is sealing a visible crack without first checking why the water is reaching it, which only moves the problem somewhere else. Another is treating the basement wall alone and ignoring the roof, bathrooms and tanks, which can all leak into the same structure. Some owners also apply coatings to a damp or dusty surface, so the layer fails early. Waiting until the first wet day of the season to act is another frequent error, because it leaves little time for proper preparation. Planning the work before summer gives the surfaces time to be cleaned, repaired and protected properly.

Checks before summer and before the rain season catch problems while they are still small.

When do you need basement & foundation waterproofing?

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

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

Where the problem usually comes from

• A common cause: cracks at construction joints.
• A common cause: rainwater draining towards the foundation.
• A high groundwater level.

Tools and methods, and when we use them

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.

Facts and costs — Alkharj

Common questions about basement & foundation waterproofing in Alkharj

Common mistakes we see

• Painting the basement wall while the water comes from outside

What you get after the work

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