Basement & foundation waterproofing for restaurants in Najran

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

Basement & foundation waterproofing in Najran: the local context

Main roads in or near Najran: Al Jarba Street. The centre of Najran sits about 1309 m above sea level (SRTM open elevation data).

Team note on Najran: 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..

Is a basement under a restaurant in Najran worth waterproofing, and what does it cost? The centre of Najran sits about 1309 m above sea level, so the city is high and inland, but below-ground walls still take in moisture from surrounding soil and from water that pools after rain. For a restaurant, a damp basement can mean damaged stock, odours reaching the dining room, and food-safety concerns. Basement waterproofing is priced at SAR 50–150 per m², and crack injection, which is the usual fix for a leaking seam, runs at SAR 40–120 per metre. The exact figure depends on the area and the condition of the walls, so a visit is the only way to firm up a quote.

The inspection starts by walking the basement and the adjacent foundation to find where water is actually entering. The inspector will look for cracks, damp patches, efflorescence, and signs of standing water on the floor, and will note which walls face the outside ground. Where cracks are present, the length is measured in metres so that injection can be priced accurately. Where the whole wall or floor is affected, the area is measured in square metres. Options such as epoxy coating, spray foam, bitumen membrane or XPS boards are then compared against the problem found, since each suits different conditions and each has its own per-m² range. The inspector explains the reasoning for each option so that the owner can decide with clear information.

Before the visit, gather what will help the inspector work quickly. Have the basement plan or any drawings of the building ready, and note any past leaks, repairs, or periods after rain when water appeared. Clear access to the walls and floor is important, and it helps to shift stored stock or equipment away from the areas being checked. If the restaurant also has a water tank or a bathroom in the same block, mention it, because tank internal coating and bathroom waterproofing are priced separately. Photos of the damp areas taken after rain are useful. With these details in hand, the inspection can focus on the real problem and the owner can compare the options on a fair, measured basis.

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

When do you need basement & foundation waterproofing?

If you notice one of these signs in Najran, 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 — we check this before anything else.
• Rainwater draining towards the foundation — we check this before anything else.
• Cracks at construction joints.

Tools we use in Najran

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 Najran

Short answers for Najran

Common mistakes we see

• Painting the basement wall while the water comes from outside

What you receive

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