Bitumen membrane for apartments in Sabya

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

Bitumen membrane in Sabya: the local context

Sabya is about 16.7 km from the sea coast (OpenStreetMap). The centre of Sabya sits about 40 m above sea level (SRTM open elevation data).

Main roads in or near Sabya: King Fahd Road, King Abdulaziz Road, King Abdullah bin Abdulaziz Road. Team note on Sabya: 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..

Sabya sits at about 40 m above sea level, and its centre is roughly 16.7 km from the coast, so the first thing a technician checks on an apartment roof is how the membrane will handle the local conditions rather than assuming a coastal climate. Before quoting, the technician looks at the existing roof surface, the drainage outlets, and whether an old membrane is still bonded or has begun to lift. Bitumen membrane for apartments is priced at SAR 15–35 per m², and that range reflects how much preparation the existing surface needs, so a clear first look at the slab prevents surprises once the work starts.

The site visit is where the real decisions are made, and it is left to the technician on the day. Parapets, pipe penetrations, roof edges and any cracked screed are measured and marked, because these points decide where the membrane must be lapped and where extra detailing is needed. Crack repair may be needed before the membrane goes down; where a crack has to be sealed by injection, the work is priced at SAR 40–120 per metre, so the length of each crack is noted in the walk-round. The technician also confirms whether a roof area is shared with a water tank, since tank internal coating (SAR 25–60 per m²) is a separate job and should not be mixed into the roof quote.

For the technician, the useful information is the roof area in square metres, the number of access points, the condition of any existing finish, and whether the apartment block has a separate bathroom or balcony waterproofing scope that should be quoted together. Note whether insulation is planned, because XPS boards (SAR 12–30 per m²) change the build-up and the order of layers. Record photographs of drainage outlets and any ponding before leaving the roof, and confirm who will provide access to the roof and at what times, so the work can be scheduled without disturbing residents.

In apartment buildings, the floor below is often where a leak shows first.

When do you need bitumen membrane?

These are the signs most often linked to bitumen membrane:

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

Where the problem usually comes from

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

Tools we use in Sabya

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.

Facts and costs — Sabya

Short answers for Sabya

Mistakes that cost more

• Leaving the membrane exposed without protection

What you get after the work

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