Roof waterproofing in Yanbu: emergency

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

Before we start: what we know about Yanbu

Main roads in or near Yanbu: King Abdulaziz Road, Umluj Road, Al Hanan Street. Team note on Yanbu: 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..

Yanbu is about 1.2 km from the sea coast (OpenStreetMap). The centre of Yanbu sits about 6 m above sea level (SRTM open elevation data).

In Yanbu, the first thing a technician checks in an emergency roof leak is how close the property sits to the coast and how much salt-laden air and moisture the roof has to withstand. The centre of Yanbu sits about 6 m above sea level, and the city is about 1.2 km from the sea coast. Because of this combination of low elevation and proximity to the sea, rainwater and humidity can settle on a roof surface and find their way into cracks more quickly than in drier inland areas. The first checks are therefore for active water entry points, ponding areas, and any cracks or open joints that could let water travel into the building.

Some matters can only be settled on site. The technician needs to see the roof surface, the drainage outlets, the condition of parapets and upstands, and how far the damage has spread before deciding on a repair method. The choice between liquid roof waterproofing, a bitumen membrane, spray foam, or insulating XPS boards depends on what the roof is made of, how it is used, and whether the leak is a surface failure or a structural crack. Crack injection is priced per metre and may be needed where a linear fault runs through the slab. The final method, its extent, and the quantities required will be confirmed only after inspection.

To help the technician arrive prepared, it is useful to note where the leak appears inside the building, when it started, and whether it worsens during rain. Photographs of stains, cracks, and ponding areas are helpful, as are details of any previous roof works and the type of finish currently on the roof. Clear access to the roof and to the rooms below should be arranged in advance. Indicative rates for the main options are roughly SAR 8–25 per m² for liquid roof waterproofing, SAR 15–35 per m² for a bitumen membrane, SAR 20–45 per m² for spray foam, SAR 12–30 per m² for XPS boards, and SAR 40–120 per m for crack injection, though the final figure depends on the inspection.

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

When do you need roof waterproofing?

These are the signs most often linked to roof waterproofing:

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

The most common causes

• Cracks in the roof slab.
• Wrong falls towards the drains.
• A common cause: damaged waterproofing around tank and AC bases.

Tools we use in Yanbu

From the first visit to the report

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 — Yanbu

Questions from Yanbu

Mistakes that cost more

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

The written outputs

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