Bitumen membrane for warehouses in Jubail

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).

Does a warehouse roof in Jubail really need a bitumen membrane, and what does it cost? Property owners here ask this often, and the answer depends on the building's exposure. The centre of Jubail sits about 4 m above sea level, and the town is about 0.9 km from the sea coast, so roofs and walls are exposed to salt-laden air and wind-driven moisture year round. For a large flat roof, a bitumen membrane is one of the options we price, at SAR 15–35 per m². Sealing the roof properly protects stored goods, racking and the structure beneath from water that would otherwise find its way in through laps, joints and penetrations.

Our inspection starts with a walk across the full roof surface to check for ponding, blistering, cracked seams and loose flashing around vents, hatches and roof-mounted equipment. The surveyor then looks at the parapets and upstands, where water tends to collect and where membranes most often fail. Where the roof meets walls or drains, the team checks the condition of the edge details and notes any signs of water staining on the ceiling below. Once the inspection is complete, we explain which areas need repair, which need full replacement, and how the work would be sequenced so that warehouse operations can continue around the crew.

Before the visit, it helps to clear access routes to the roof and to note any known leak points, past repairs or areas where water has previously pooled. Please tell us about any roof-mounted plant, skylights or drainage problems so the surveyor can plan safe access. If the building also has a tank, a basement or an area that gets damp, mention it at booking, because those surfaces are priced separately and may be worth assessing on the same day. Keep records of earlier roof work, and have the warehouse layout and approximate roof area ready. With this information, the inspection can focus on what matters and the quotation will reflect your building as it actually is.

For warehouses, work is phased around operations and stored goods.

Signs that call for bitumen membrane

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

• Old rolls that are cracking
• A flat concrete roof that needs waterproofing

Where the problem usually comes from

• Seams that were not welded properly — we check this before anything else.
• No protection layer — we check this before anything else.

Tools we use in Jubail

How the work is done, step by step

1. Preparation: Cleaning, priming and repairs.
2. Torch welding: Overlaps are welded and checked.
3. Details: Upstands, drains and bases.
4. Protection and flood test: Protection is laid after a successful flood test.

Facts and costs — Jubail

Short answers for Jubail

Common mistakes we see

• Leaving the membrane exposed without protection

The written outputs

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