Floor & balcony waterproofing in Jubail: emergency

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

Floor & balcony waterproofing in Jubail: the local context

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

Jubail is about 0.9 km from the sea coast (OpenStreetMap).

Floor and balcony leaks in Jubail most often start at the edges, where the membrane meets a wall, a drain or a door threshold, and not in the middle of the slab. Water finds these joints first, so staining often appears on the ceiling below before anyone sees damp on the balcony itself. For an emergency call, the first step is to look for fresh staining, blistering tiles and soft spots along these junctions, and to note whether the water is coming from above, from the side or from a drain.

Jubail sits about 4 m above sea level, and the town lies about 0.9 km from the coast. That combination means salt-laden air and a high water table can both play a role, especially on lower floors and at ground-level balconies. A balcony that drains poorly and stays wet will push moisture into the slab over time, so the repair plan needs to account for how the surface falls toward its outlets. Materials that trap salt or moisture underneath can fail sooner here, which is why the choice of system should follow the exposure and not just the size of the leak.

Before the visit, ask which area the crew will cover and whether the price is quoted per square metre, since the common rates for this kind of work run from SAR 15–35 per m² for bitumen membrane, SAR 8–25 per m² for liquid roof waterproofing and SAR 35–90 per m² for epoxy coating. Ask for a site check of the drains and falls, whether crack injection at SAR 40–120 per metre is needed along any joint, and how the surface will be prepared before the new layer goes down. Confirm who will explain the repair once the work is finished, and ask how the area will be checked before the balcony is used again.

If water is flowing, close the main valve first, then call or message with photos.

Signs worth paying attention to

The following signs are worth checking before they grow:

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

Causes we see in the field

• A common cause: a blocked drain.
• A threshold without waterproofing.
• A common cause: incorrect falls.

How we choose the tool in Jubail

From the first visit to the report

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.

Facts and costs — Jubail

Questions from Jubail

Mistakes that cost more

• Tiling a balcony without waterproofing

The written outputs

The written output: the flood result and photos of the details. The report is numbered and can be checked with its verification code.