Bitumen membrane for schools in Samtah

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

Bitumen membrane in Samtah: the local context

Main roads in or near Samtah: Al-Turshiyah and Al-Najmiyah Road, Samtah. Team note on Samtah: 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..

Samtah is about 22.6 km from the sea coast (OpenStreetMap). The centre of Samtah sits about 61 m above sea level (SRTM open elevation data).

Before any bitumen membrane goes down on a school roof in Samtah, the technician checks the basic setting of the building. The centre of Samtah sits about 61 m above sea level (SRTM open elevation data), so the town is an inland, elevated location rather than a coastal one. Samtah is about 22.6 km from the sea coast (OpenStreetMap), which means the site is not directly exposed to the salt-laden air that can accelerate wear on coastal buildings. Knowing this helps set expectations for the surface condition and the likely build-up of dust and heat on the roof, both of which affect how the membrane is prepared.

Several things are left to the site visit, because they cannot be judged from a distance. The technician needs to walk the roof and look at the existing finish, the drainage outlets, the upstands around plant and access hatches, and any signs of ponding after rain. The condition of the substrate decides whether the old surface can take a new membrane or must be cleaned back first. Stains, blisters, loose laps and cracked parapets are all recorded on the day, not guessed in advance. The age and type of the current covering, and whether the school plans to keep using the roof for equipment, also shape the final scope.

For the technician's own planning, the price band for this work is SAR 15–35 per m² for a bitumen membrane, which gives a useful starting point when comparing roof areas. For context on how bitumen compares with other systems, liquid roof waterproofing is SAR 8–25 per m², and XPS boards are SAR 12–30 per m², so the choice of system should follow the substrate and access rather than price alone. Crack injection, where it applies to the roof edges or joints, is priced at SAR 40–120 per metre. Bring a notebook for the roof areas, the number of outlets, and any photos of defects, because those details decide where the membrane needs extra layers and detailing.

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

Signs that call for bitumen membrane

These are the signs most often linked to bitumen membrane:

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

Causes we see in the field

• 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 Samtah

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 Samtah

Questions from Samtah

Common mistakes we see

• Leaving the membrane exposed without protection

The written outputs

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