Bitumen membrane for clinics in Jazan

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

Before we start: what we know about Jazan

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

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..

Picture the owner of a small private clinic in Jazan. The building has a flat roof that takes the full afternoon sun, and the clinic needs to stay dry, clean and operational year-round. Water that gets in through the roof can stain treatment rooms, damage equipment and interrupt patient care, so the owner wants a waterproofing system that is reliable and does not require the clinic to close for long periods.

The local facts shape the decision. The centre of Jazan sits about 7 m above sea level, and Jazan is about 1.9 km from the sea coast. For a clinic on a flat roof, this means the building is close enough to the coast to be exposed to salt-laden air, which can wear down surfaces over time, yet high enough that standing water on the roof is more likely to drain away than pool. Bitumen membrane at SAR 15–35 per m² is a practical option for a roof of this kind, because it forms a continuous sheet that can be laid over the existing surface and sealed at the edges and around roof penetrations. For wider roof areas, liquid roof waterproofing at SAR 8–25 per m² can also be considered where a seamless coating suits the surface.

Practical steps follow in order. First, inspect the roof and mark every crack, blister and drain point. Second, repair cracks using crack injection at SAR 40–120 per metre, so the surface is sound before any membrane goes down. Third, clean the substrate thoroughly and let it dry, since moisture trapped under a membrane causes lifting. Fourth, lay the bitumen membrane, overlapping seams and turning it up walls and around pipes. Fifth, check drainage outlets so rainwater can leave the roof freely. Finally, schedule a follow-up inspection to confirm the edges and penetrations are still sealed, and keep a simple record of the work for future maintenance.

For clinics, work is scheduled around patient hours and kept to the areas that need it.

Signs worth paying attention to

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

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

Causes we see in the field

• A common cause: no protection layer.
• A common cause: seams that were not welded properly.

Tools we use in Jazan

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.

Quick comparison: facts and costs in Jazan

Common questions about bitumen membrane in Jazan

What we advise against

• Leaving the membrane exposed without protection

What you receive

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