Bitumen membrane for schools in Alzulfi

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

What is specific about Alzulfi for bitumen membrane

Team note on Alzulfi: 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 Alzulfi sits about 615 m above sea level (SRTM open elevation data).

Main roads in or near Alzulfi: King Fahd Road, Sheikh Ibn Baz Square, King Salman Road.

Bitumen membrane work for schools in Alzulfi starts with the site itself. The centre of Alzulfi sits about 615 m above sea level (SRTM open elevation data), so the first thing a technician checks is how the roof and any exposed surfaces are placed in relation to the local rainfall and drainage pattern. Before any price is discussed, the surface is inspected for old membrane that is lifting, blistered or split, because a new layer laid over failing material will not hold for long. The reference rate for this work is SAR 15–35 per m², and that range only means something once the true area and condition of the roof are known.

Several things are left to the site visit and cannot be judged from a distance. The technician measures the roof area, notes the number of penetrations such as pipes, vents and access hatches, and checks the slope so that water runs toward the outlets rather than pooling. Where the roof meets walls and parapets, the upstand height and the state of the edge flashing are recorded. If the school plans to fix a separate fault in a basement or a water tank, that is assessed on its own terms, since basement waterproofing (SAR 50–150 per m²) and tank internal coating (SAR 25–60 per m²) are priced and handled differently. Cracks are also measured on site, as crack injection is charged per metre, at SAR 40–120 per m.

For the technician, the most useful information is a clear record of the building before work begins. Photographs of the roof from several angles, the age of the existing covering if the school knows it, and any history of leaks in specific rooms all help narrow the work. Access arrangements matter in a school, so timing around term dates and the location of storage for materials should be agreed in advance. Where insulation is involved, XPS boards (SAR 12–30 per m²) may be considered beneath a new covering, and the technician will note the existing insulation layer during the visit. A written list of the areas to be covered, shared before the visit, lets the technician arrive ready to measure rather than to explore.

For schools, the larger jobs are planned for weekends and holidays.

Signs worth paying attention to

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

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

Where the problem usually comes from

• No protection layer — we check this before anything else.
• A common cause: seams that were not welded properly.

Tools we use in Alzulfi

The steps in order

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 — Alzulfi

Short answers for Alzulfi

Mistakes that cost more

• 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.