Roof waterproofing in Jubail: emergency

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

Why roof waterproofing differs in 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).

What do you do when water starts coming through your roof in Jubail and you need someone out fast? The first thing to understand is that the city sits low and close to the coast, which affects how water behaves on a roof. The centre of Jubail sits about 4 m above sea level, and the city is about 0.9 km from the sea coast. With the ground so flat and the sea so near, rainwater has little natural fall to drain away, so pooled water and seepage can build up quickly once a membrane begins to fail. An emergency call is usually justified when you see active dripping, ceiling stains that are spreading, or water running down an internal wall.

When the visit begins, the aim is to find the source before any repair is quoted. A technician will walk the roof surface and check the areas where water tends to collect and enter, such as drains, upstands, joints around rooftop fixtures, and any visible cracks. Where the leak appears inside, the inspector will trace it back up to the roof rather than assuming the nearest patch is the cause. Crack work is priced per metre, typically SAR 40–120 per m, so the length of the defect matters to the cost. For the roof surface itself, options include liquid roof waterproofing at SAR 8–25 per m², bitumen membrane at SAR 15–35 per m², and spray foam at SAR 20–45 per m². Each method suits a different condition, so the inspector should explain which one fits what they found.

Before the visit, gather what will help the inspector work quickly. Note when the leak first appeared, whether it is worse after rain, and which room or ceiling area is affected. Photograph the stains and any water marks so you can show how they have changed. Clear access to the roof hatch or stairs, and move valuables and furniture away from the affected wall or ceiling. If there is an existing waterproofing warranty or a record of past roof work, have that paperwork ready. Keep the area below the leak protected with a bucket or sheet until repairs begin, and avoid walking on a wet roof yourself.

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:

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

Causes we see in the field

• A common cause: cracks in the roof slab.
• A common cause: wrong falls towards the drains.
• Damaged waterproofing around tank and AC bases — we check this before anything else.

Tools and methods, and when we use them

The steps in order

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.

Facts and costs — Jubail

Common questions about roof waterproofing in Jubail

What we advise against

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

What you get after the work

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