Basement & foundation waterproofing in Jazan: before buying or handover

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

Before we start: what we know about Jazan

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).

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..

Basement and foundation waterproofing in Jazan starts with the location itself. The centre of Jazan sits about 7 m above sea level (SRTM open elevation data), and the city is about 1.9 km from the sea coast (OpenStreetMap). Because the land is low and close to the water, the first things a technician checks are how water moves through the ground around the walls and floor, and whether the basement sits at a level where groundwater or surface run-off could collect. Before any price is agreed, the site should be inspected for damp patches, efflorescence on the walls, staining at the joints, and signs of earlier repairs that may have failed.

Some parts of the job can only be judged on the day. The technician needs to see the actual condition of the concrete, the position of cracks, the state of the existing membrane if one is present, and the drainage around the outside of the building. Crack injection is priced per metre, so the length and location of each crack must be measured on site, and basement waterproofing is priced per square metre of wall and floor area, so the surfaces must be confirmed in person. Rates in Jazan typically fall within SAR 50–150 per m² for basement waterproofing, but the final figure depends on what the inspection finds. Epoxy coating, spray foam, bitumen membrane and XPS boards each suit different conditions, and the choice should be made only after the visit.

To help the technician prepare, the homeowner or property manager should share any previous waterproofing invoices, the age of the building, the depth of the basement, and a note of when water has been seen and after which kind of rain. Clear access to the walls and to the outside drainage makes the inspection faster. Mention any plans to use the basement for storage, a water tank or a bathroom, since tank internal coating and bathroom waterproofing (SAR 15–40 per m²) follow different specifications. The more precise the information at the start, the more accurate the visit and the quotation will be.

Before buying or taking over a property, an inspection gives you findings in writing before you sign.

When do you need basement & foundation waterproofing?

If you notice one of these signs in Jazan, it is a good moment to talk to the team:

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

The most common causes

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

Tools we use 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

Questions from Jazan

Mistakes that cost more

• Painting the basement wall while the water comes from outside

What you get after the work

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