Basement & foundation waterproofing for villas in Jazan

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

Before we start: what we know about Jazan

Team note on Jazan: 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.. Jazan is about 1.9 km from the sea coast (OpenStreetMap).

The centre of Jazan sits about 7 m above sea level (SRTM open elevation data).

Basement and foundation leaks in villas are most often caused by water pushing through hairline cracks and cold joints in the lower walls and slab, especially after heavy rain when the ground around the foundation becomes saturated. In Jazan, the centre sits about 7 m above sea level, and the city is about 1.9 km from the sea coast. That combination means the ground is low and close enough to the coast that moisture and salt-laden groundwater can rise into the lower levels, so a basement that stays dry in one season may show damp patches in another. Because the water table is close to the surface, the approach has to address both the source of the water and the route it takes into the structure, rather than only sealing the visible wet area.

Local conditions change the method. Crack injection is typically priced at SAR 40–120 per metre and is often the first step where cracks are the entry point, while basement waterproofing is priced at SAR 50–150 per m² when the whole wall or slab needs treatment. Where moisture is rising through walls, a bitumen membrane at SAR 15–35 per m² or XPS boards at SAR 12–30 per m² may be considered as part of a wider system, and epoxy coating at SAR 35–90 per m² can be used on finished interior surfaces. A proper plan will explain which of these options suits your walls, your drainage, and your finishes, and why, rather than applying one product to every problem.

Before the visit, ask the provider to confirm the exact location of the leaks and whether they appear after rain, after irrigation, or all year. Ask how they will measure the affected area in square metres and crack length in metres, and request an itemised quote that separates each treatment from its unit rate. Ask whether the work includes checking the external ground levels and drainage around the villa, since water that is not directed away from the foundation will eventually defeat any internal coating. Finally, ask what they will inspect before they recommend a product, and whether they will explain the options in writing so you can compare them calmly.

In a villa, tanks, the roof and the yard lines are usually yours to look after, so it helps to know where the main valve and tank hatches are.

When do you need basement & foundation waterproofing?

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

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

The most common causes

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

Tools we use in Jazan

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 Jazan

Short answers for Jazan

Mistakes that cost more

• 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.