Roof waterproofing in Jubail: with a verifiable technical report

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

What is specific about Jubail for roof waterproofing

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).

Picture a typical homeowner in Jubail who has noticed a damp patch on the ceiling after the last rain, or a stain spreading across a flat roof slab. They want the leak fixed properly, without paying for work they do not need, and they want a clear record of what was done. Most owners in this position are not roofing specialists, so the first question they face is which system suits the roof and what it should cost.

The local facts shape that choice. The centre of Jubail sits about 4 m above sea level, and the town is about 0.9 km from the sea coast. Those two facts mean a roof here is exposed to salt-laden coastal air and to wind-driven moisture, so the surface needs a membrane that resists both, and any detail where water can get underneath should be sealed rather than just painted over. Liquid roof waterproofing is typically priced at SAR 8–25 per m², while a bitumen membrane sits at SAR 15–35 per m², so the choice between them is partly a question of the slab's condition and the budget. Where the damage is in a crack rather than across the surface, crack injection at SAR 40–120 per m may be the more sensible first step.

A practical sequence helps keep the job under control. First, have the roof inspected to find the actual source of water, including cracks, upstand junctions and drainage outlets. Second, ask for a written technical report that records the areas, the defects and the proposed system, so the scope can be checked against the quote. Third, repair cracks and drainage points before any membrane goes down, because a new layer laid over a failing detail will fail too. Fourth, confirm the surface is clean and dry enough for the chosen product, then apply the membrane in the specified number of coats. Finally, keep the report and the handover documents with your property records, so any future inspection starts from a known baseline.

Each job ends with a written report that carries a verification code you can check on our site.

Signs that call for roof waterproofing

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

• The old waterproofing is cracking
• Stains on the top-floor ceiling after rain
• Water pooling on the roof

Where the problem usually comes from

• Cracks in the roof slab — we check this before anything else.
• Damaged waterproofing around tank and AC bases.
• Wrong falls towards the drains.

Tools we use in Jubail

How the work is done, step by step

1. Survey: Falls, drains and the condition of the old layer are recorded.
2. Preparation: Cleaning and repairs before any new layer.
3. Primer: The base coat that the system needs.
4. Waterproofing layers and details: Corners, upstands and bases get their own detail.
5. Flood test: The roof is flooded and checked before it is covered.

Jubail in facts and sources

Questions from Jubail

Common mistakes we see

• Covering the waterproofing before the flood test
• Ignoring the tank bases

What you receive

You receive: a quality record with photos and the flood-test result, in a technical report with a verification code.