Basement & foundation waterproofing for villas in Qatif

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

Before we start: what we know about Qatif

Team note on Qatif: 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.. Qatif is about 2.5 km from the sea coast (OpenStreetMap).

The centre of Qatif sits about 5 m above sea level (SRTM open elevation data).

Picture a villa owner in Qatif who has finished a basement for storage or a family room. After a wet season, a damp patch appears on the lower wall, and a faint musty smell settles into the space. The owner wonders whether the problem comes from the ground, a crack, or the drainage around the building. Such questions are common for villas built close to the surface, where moisture has room to find its way in.

The local facts shape what this means. The centre of Qatif sits about 5 m above sea level, and the town is about 2.5 km from the sea coast. A site this low and this close to the coast means the ground around a basement can hold water and salt-laden moisture for longer. Waterproofing a basement here is therefore less about a single fix and more about keeping water away from the structure. Costs for basement waterproofing run SAR 50–150 per m², while crack injection is priced at SAR 40–120 per metre, so an owner should first understand where the water is actually entering before choosing a method.

A sensible sequence starts with inspection. Walk the basement walls and floor after rain, mark any damp areas, and note every visible crack. Next, address the cracks, since crack injection is usually the first repair when water is finding a direct path through the structure. Then consider the surfaces. Bitumen membrane (SAR 15–35 per m²) or XPS boards (SAR 12–30 per m²) can be fitted to protect walls, while epoxy coating (SAR 35–90 per m²) suits floors and surfaces needing a tougher finish. Bathrooms and any tanks should be treated separately, with bathroom work at SAR 15–40 per m² and tank internal coating at SAR 25–60 per m². Finally, check the roof, where liquid roof waterproofing at SAR 8–25 per m² helps keep water from reaching the spaces below.

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?

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.
• A common cause: a high groundwater level.
• A common cause: rainwater draining towards the foundation.

Tools and methods, and when we use them

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.

Facts and costs — Qatif

Short answers for Qatif

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.