Bitumen membrane for apartments in Jubail

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

Why bitumen membrane 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.. 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).

Do apartment roofs in Jubail need a bitumen membrane, and what does it cost? Jubail's centre sits about 4 m above sea level, and the town is roughly 0.9 km from the sea coast. That closeness to the shore means salty, humid air is a constant factor for buildings here, so the roof and the top floor of an apartment block take a steady load of weather. A bitumen membrane is one of the waterproofing options used on roof slabs, and it is priced at SAR 15–35 per m². For a building owner comparing options, the cost sits between the lower-priced liquid roof waterproofing at SAR 8–25 per m² and the higher-priced epoxy coating at SAR 35–90 per m², so the choice depends on the roof's condition and the layout of the slab.

An inspection for a bitumen membrane job usually starts with a walk over the whole roof surface to look for cracks, ponding areas, and any lifted or blistered sections of the existing covering. The inspector checks the edges, the parapets, and the points where pipes and roof hatches pass through, because water tends to enter at those joints first. Where cracks are found, they are noted separately, since crack injection is priced per metre at SAR 40–120 per m and is handled as its own job before any new membrane goes on. The inspector also looks at the drainage outlets to confirm that water can leave the roof without standing. Each finding is recorded with its location so the owner can see what the work will cover and why.

Before the visit, the property owner should gather a few basic details that make the inspection faster and the quote more accurate. Note the roof area in square metres if it is known, and tell the inspector whether the building has any tanks or a basement, since those are separate waterproofing items with their own rates, such as tank internal coating at SAR 25–60 per m² and basement waterproofing at SAR 50–150 per m². Clear access to the roof, including the key to the roof door and any stairway access, saves time on the day. It also helps to mention any leaks that have already appeared inside the apartments, and the rooms where they show, so the inspector can trace them back to the roof.

In an apartment, a problem may start in your unit or in a shared line; we separate the two before any work.

Signs that call for bitumen membrane

The following signs are worth checking before they grow:

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

Causes we see in the field

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

How we choose the tool 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.

Jubail in facts and sources

Short answers for Jubail

What we advise against

• Leaving the membrane exposed without protection

What you receive

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