Bitumen membrane in Jazan: preventive periodic check

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

Why bitumen membrane differs in Jazan

Jazan is about 1.9 km from the sea coast (OpenStreetMap). The centre of Jazan sits about 7 m above sea level (SRTM open elevation data).

Team note on Jazan: 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..

Jazan sits close to the Red Sea, and the centre of the city is only about 7 m above sea level, while the coast is roughly 1.9 km away. For a bitumen membrane on a roof or podium, that combination means the first thing a technician looks at is the membrane's surface and edges, because salty, humid air and low-lying ground both work against sealed layers over time. A periodic check here starts with the parts of the membrane most exposed to the weather: the upturns at parapets, the laps between sheets, and any spot where the membrane has begun to lift or blister.

Some points cannot be settled from a description and are left to the site visit. The technician needs to see how the membrane is bonded, whether water is pooling anywhere on the roof, and whether drains and outlets are clear and still sitting at the right level. The condition of the surface finish, any signs of ponding after rain, and the state of the flashing around pipes and roof equipment are all judged on the spot. A quoted rate is only a starting point, so the technician confirms the actual area and condition before any work is priced. Bitumen membrane is typically priced at SAR 15–35 per m², but the real figure depends on what the inspection finds.

To help the technician, it is useful to have a few things ready before the visit. Tell us the roof area, if known, and whether the building has a basement or water tank, since these may need separate checks. Describe any leaks, damp patches, or water stains you have noticed, and when they appear, such as after heavy rain or on hot afternoons. Note the age of the roof and any previous repairs. If you have photos of the roof surface, parapets, or drain outlets, send them in advance. This lets the technician plan the visit, bring the right tools, and focus the inspection on the areas most likely to need attention.

Preventive checks follow a written schedule instead of waiting for a fault.

Signs worth paying attention to

The following signs are worth checking before they grow:

• 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 Jazan

From the first visit to the report

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.

Quick comparison: facts and costs in Jazan

Common questions about bitumen membrane in Jazan

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.