Floor & balcony waterproofing in Jubail: before buying or handover

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

Before we start: what we know about Jubail

Team note on Jubail: 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.. Jubail is about 0.9 km from the sea coast (OpenStreetMap).

The centre of Jubail sits about 4 m above sea level (SRTM open elevation data).

Before you buy or take over a property in Jubail, the first thing to check is how close the ground sits to the water. The centre of Jubail sits about 4 m above sea level (SRTM open elevation data), and the town is about 0.9 km from the sea coast (OpenStreetMap). Those two facts mean that damp, salt-laden air and a high water table are common concerns here, so a floor or balcony that looks sound may still be hiding moisture at its base. Ask whether the lower floors or any basement have shown staining, efflorescence or a musty smell, and check whether earlier waterproofing was applied at all.

Some things cannot be judged from a brochure or a photograph and are left to the site visit. A technician will need to walk the surfaces, probe for soft or hollow areas, look at the joints between floor and wall, and check where water drains on balconies and roofs. They will also look for cracks and decide whether crack injection is needed, measure the areas involved, and confirm whether the existing surface can take a new coating or must be prepared first. Where a basement, a water tank or a bathroom is part of the job, the visit should cover each of these separately, since the materials and conditions differ.

Useful information helps the technician price and plan the work sensibly. Tell them the approximate area of each floor, balcony, bathroom or roof, the number and length of visible cracks, and whether there is a basement or a water tank that needs internal coating. Mention any previous repairs, the age of the building and any leaks noticed after rain. Typical ranges for common options include basement waterproofing at SAR 50–150 per m², bathroom waterproofing at SAR 15–40 per m², epoxy coating at SAR 35–90 per m², and liquid roof waterproofing at SAR 8–25 per m². Final figures depend on what the visit finds, so treat these as a starting point for comparison.

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

When do you need floor & balcony waterproofing?

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

• Damp under the light well
• A wrong fall towards the door threshold
• Water passing from the balcony to the floor below

The most common causes

• A blocked drain — we check this before anything else.
• Incorrect falls.
• A common cause: a threshold without waterproofing.

Tools and methods, and when we use them

The steps in order

1. Checking the falls: Where water collects and where it should go.
2. Details: Thresholds, drains and upstands.
3. Waterproofing: The layer is applied and protected.
4. Flood test: Tested before the finish goes on.

Jubail in facts and sources

Short answers for Jubail

What we advise against

• Tiling a balcony without waterproofing

What you get after the work

You receive: the flood result and photos of the details, in a technical report with a verification code.