Bitumen membrane for apartments in Alnuayriyah

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

Before we start: what we know about Alnuayriyah

Team note on Alnuayriyah: 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.. Main roads in or near Alnuayriyah: King Abdulaziz Road.

The centre of Alnuayriyah sits about 49 m above sea level (SRTM open elevation data).

Bitumen membrane is the usual answer for flat roofs on apartment blocks in Alnuayriyah, and the most common problem is water that finds its way under a worn or poorly lapped sheet and appears as damp on the top-floor ceiling. Ponding after rain, cracked surface finish, and blistering along upstands are the early signs. Left alone, a small leak becomes a costly repair to the slab and the flat below, so it is worth acting once the first stain shows.

The local setting shapes the approach. The centre of Alnuayriyah sits about 49 m above sea level (SRTM open elevation data), so the ground here is not a low-lying basin where water collects from every direction, but roof drainage still needs to be checked carefully, because outlets and gradients decide where water sits. A good job starts with clearing outlets, confirming the fall toward them, and deciding whether the existing membrane can be overlaid or needs to be stripped back. Bitumen membrane for roofs is priced at SAR 15–35 per m², and the final figure depends on the area, the condition of the substrate and the number of upstands and penetrations that need detailing. Where the roof also has hairline cracks in the screed, crack injection is priced at SAR 40–120 per metre and should be included in the same visit rather than left for later.

Before the visit, ask the provider which membrane system they plan to use and whether the price covers primer, detailing at drains and parapets, and removal of old material if it is needed. Ask how they will test the finished roof, for example with a ponding check or a water test on the upstands, and whether the work includes protection of the surface from foot traffic. Ask who will inspect the roof after heavy rain in the months that follow. Clear answers on these points make it easier to compare quotes fairly and to know what you are actually paying for.

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

Signs worth paying attention to

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

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

Tools and methods, and when we use them

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 — Alnuayriyah

Short answers for Alnuayriyah

Mistakes that cost more

• 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.