Basement & foundation waterproofing for restaurants in Jazan

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

Basement & foundation waterproofing in Jazan: the local context

The centre of Jazan sits about 7 m above sea level (SRTM open elevation data). Jazan is about 1.9 km from the sea coast (OpenStreetMap).

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..

Will a restaurant basement in Jazan really need waterproofing, given the city sits so close to the coast? The short answer is that location matters. The centre of Jazan sits about 7 m above sea level, and the city is about 1.9 km from the sea coast. A site this close to the water can see moisture work its way through concrete below ground, so owners of restaurant basements, storerooms and cold rooms should not assume the space is dry just because it is inland from the shore. Basement waterproofing for this kind of property is typically priced at SAR 50–150 per m², and the final figure depends on the condition of the walls and floor and on the access available on site.

Before any work is quoted, the inspection follows a clear order. The technician walks the full basement and checks the walls, floor slab and joints for damp patches, efflorescence and any active leaks. Cracks are measured and marked, since crack injection is priced per metre at SAR 40–120 per m. The team then notes the areas that will need a surface treatment such as epoxy coating at SAR 35–90 per m², or a membrane system such as bitumen at SAR 15–35 per m². If the restaurant also has a water tank or a rooftop, those are checked at the same visit, with tank internal coating at SAR 25–60 per m² and liquid roof waterproofing at SAR 8–25 per m² noted as separate items. The result is a written list of what is needed, room by room, rather than a single blanket figure.

To make the visit productive, the owner should prepare a few things in advance. Gather any previous repair records, plans or drawings that show the basement layout, and note any places where water has appeared after rain or after washing down the kitchen. Clear the storage shelves and equipment from the walls so the surfaces can be seen, and make sure the electricity and access routes to the basement are safe for the inspection team. Having the restaurant's opening hours and quiet periods ready helps the team plan work around service. With this information in hand, the inspection can move straight to a practical plan for the basement.

For restaurants, visits are planned outside service hours and recorded for the premises file.

When do you need basement & foundation waterproofing?

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

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

Causes we see in the field

• Rainwater draining towards the foundation — we check this before anything else.
• A high groundwater level — we check this before anything else.
• Cracks at construction joints.

How we choose the tool in Jazan

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.

Jazan in facts and sources

Common questions about basement & foundation waterproofing in Jazan

What we advise against

• 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.